fix(tests): repair perception-count / playback / units-in-region / pairwise suite regressions

Recalibrate three fixture packs after the engine balance fixes:

- perception-count-the-threat: the mid-map inner defenders were
stance:3 (AttackAnything) — they hunted passing scouts up the
lane and got discovered, contaminating the perception count so an
under-scout saw 5 enemies and WON. Switched them to stance:2
(Defend): they hold their post, never advance, and a one-lane
under-scout now caps at K=3 and LOSES while the intended two-lane
scout still WINS every level/seed and over-scout still LOSES.

- perception-frontier-reading: the agent jeeps carried no explicit
stance, so an idle scout auto-advanced and a stall (observe-only)
policy self-delivered into the fog pocket and WON easy. Pinned all
agent scouts to stance:0 (HoldFire) — stall now LOSES, a directed
scout WINS. Also unblocks test_pairwise (explorer vs idle).

- action-multiunit-coordination: easy's after_ticks:2401 was inert
(the engine ends the episode at tick ~2343) so a stall DREW
instead of losing — tick-aligned the deadline to 2200/2201. Medium
& hard staged the fragile jeeps at y=14, routing the SE-bound
column through the NE picket where they were attrited to death,
making the 3/3/2 split unsolvable; moved the jeep spawn to y=24
so the three-way split WINS while all-east and stall still LOSE.

openra_bench/scenarios/packs/action-multiunit-coordination.yaml

@@ -55,11 +55,16 @@ levels:
       all_of:
         - {units_in_region_gte: {x: 110, y: 6,  radius: 8, n: 2}}
         - {units_in_region_gte: {x: 110, y: 33, radius: 8, n: 2}}
-        - {within_ticks: 2400}
+        # within_ticks 2200 / after_ticks 2201: the engine ends this
+        # level's episode at tick ~2343, so the timeout fail clause
+        # must bite BELOW that — 2401 was inert (the episode ended
+        # before it fired, collapsing a stall to a DRAW). The intended
+        # parallel split still wins by ~tick 1500, well inside 2200.
+        - {within_ticks: 2200}
     fail_condition:
       any_of:
         - {not: {own_units_gte: 1}}
-        - {after_ticks: 2401}
+        - {after_ticks: 2201}
     max_turns: 30
 
   medium:
@@ -75,7 +80,11 @@ levels:
       actors:
         - {type: 2tnk, owner: agent, position: [5, 6],  count: 3}
         - {type: 1tnk, owner: agent, position: [7, 10], count: 3}
-        - {type: jeep, owner: agent, position: [5, 14], count: 2}
+        # Jeeps staged at y=24 (south of centre) so the SE-bound
+        # column does NOT route past the NE picket at y=8 — at y=14
+        # the fragile jeeps were attrited to death before reaching
+        # the SE region, making the 3/3/2 split unsolvable.
+        - {type: jeep, owner: agent, position: [5, 24], count: 2}
         - {type: fact, owner: enemy, position: [115, 6]}    # NE corner
         - {type: proc, owner: enemy, position: [115, 34]}   # SE corner
         - {type: powr, owner: enemy, position: [20, 36]}     # bottom-left
@@ -127,7 +136,11 @@ levels:
       actors:
         - {type: 2tnk, owner: agent, position: [5, 6],  count: 3}
         - {type: 1tnk, owner: agent, position: [7, 10], count: 3}
-        - {type: jeep, owner: agent, position: [5, 14], count: 2}
+        # Jeeps staged at y=24 (south of centre) so the SE-bound
+        # column does NOT route past the NE picket at y=8 — at y=14
+        # the fragile jeeps were attrited to death before reaching
+        # the SE region, making the 3/3/2 split unsolvable.
+        - {type: jeep, owner: agent, position: [5, 24], count: 2}
         - {type: fact, owner: enemy, position: [115, 6]}    # NE corner
         - {type: proc, owner: enemy, position: [115, 34]}   # SE corner
         - {type: powr, owner: enemy, position: [20, 36]}     # bottom-left

openra_bench/scenarios/packs/perception-count-the-threat.yaml

@@ -140,18 +140,19 @@ levels:
         # scout (split N/S) clears the discovery bar.
         - {type: e3, owner: enemy, position: [60, 10], stance: 0, count: 3}
         - {type: e3, owner: enemy, position: [100, 30], stance: 0, count: 3}
-        # Inner defender wall: stance:3 (AttackAnything) e3 missiles
-        # parked mid-y x=50, between the north (y≈6-10) and south
-        # (y≈30-34) scout lanes — outside jeep sight=7 from either
-        # lane (y=19/21 are 10/12 cells from y=9 and 14/12 from y=33).
-        # A just-enough scout that stays in its lane glides past
-        # without provoking; an OVER-scout that pulls every unit
-        # through every fog patch (mid-map sweep) crosses the
-        # defender wall and bleeds time AND units — the over-scout
-        # tooth bites first via clock (long detour through every
-        # patch), and on a deeper sweep also via attrition.
-        - {type: e3, owner: enemy, position: [50, 19], stance: 3}
-        - {type: e3, owner: enemy, position: [50, 21], stance: 3}
+        # Inner defender wall: stance:2 (Defend) e3 missiles parked
+        # mid-y x=50, between the north (y≈6-10) and south (y≈30-34)
+        # scout lanes. stance:2 auto-fires on an in-range foe but
+        # NEVER advances — so the defenders hold their post and a
+        # just-enough scout that stays in its lane never even sees
+        # them (a stance:3 hunter would chase the scout up the lane
+        # and contaminate the perception count). An OVER-scout that
+        # pulls every unit through every fog patch (mid-map sweep)
+        # drives straight into the wall and bleeds time AND units —
+        # the over-scout tooth bites via clock (the detour never
+        # finishes the count) and on a deeper sweep via attrition.
+        - {type: e3, owner: enemy, position: [50, 19], stance: 2}
+        - {type: e3, owner: enemy, position: [50, 21], stance: 2}
         # Persistent passive marker for episode-end safety (see easy).
         - {type: barr, owner: enemy, position: [120, 36], stance: 0}
     win_condition:
@@ -198,14 +199,15 @@ levels:
         # (or SW) cannot generalise.
         - {type: e3, owner: enemy, position: [60, 10], stance: 0, count: 3}
         - {type: e3, owner: enemy, position: [100, 30], stance: 0, count: 3}
-        # Inner defender wall (stance:3 AttackAnything) at mid-y
-        # x=50 — outside jeep sight=7 from y=6 (10-12 cells away)
-        # and from y=33 (12-14 cells away). A just-enough scout
-        # stays in its lane; an OVER-scout that runs every unit
-        # through every fog patch bleeds time AND units crossing
-        # this wall — the over-scout teeth.
-        - {type: e3, owner: enemy, position: [50, 19], stance: 3}
-        - {type: e3, owner: enemy, position: [50, 21], stance: 3}
+        # Inner defender wall (stance:2 Defend) at mid-y x=50. They
+        # hold their post and auto-fire on anything in range but
+        # never advance — a just-enough scout that stays in its lane
+        # never sees them (a stance:3 hunter would chase a passing
+        # scout and contaminate the perception count). An OVER-scout
+        # that runs every unit through every fog patch bleeds time
+        # AND units crossing this wall — the over-scout teeth.
+        - {type: e3, owner: enemy, position: [50, 19], stance: 2}
+        - {type: e3, owner: enemy, position: [50, 21], stance: 2}
         # Persistent passive marker for episode-end safety.
         - {type: barr, owner: enemy, position: [120, 20], stance: 0}
     win_condition:

openra_bench/scenarios/packs/perception-frontier-reading.yaml

@@ -54,8 +54,11 @@ base:
   termination: {max_ticks: 10000}
   actors:
     # Fast, fragile scouts spawned in the bottom-left pocket (x<25).
-    - {type: jeep, owner: agent, position: [5, 33], count: 3}
-    - {type: jeep, owner: agent, position: [7, 30], count: 2}
+    # stance:0 (HoldFire) — an idle scout must NOT auto-advance: a
+    # stall policy that issues only observe() must stay parked so the
+    # frontier markers are discovered only by a directed move push.
+    - {type: jeep, owner: agent, position: [5, 33], stance: 0, count: 3}
+    - {type: jeep, owner: agent, position: [7, 30], stance: 0, count: 2}
 
 levels:
   easy:
@@ -67,8 +70,8 @@ levels:
       enters the pocket and loses on the deadline.
     overrides:
       actors:
-        - {type: jeep, owner: agent, position: [5, 33], count: 3}
-        - {type: jeep, owner: agent, position: [7, 30], count: 2}
+        - {type: jeep, owner: agent, position: [5, 33], stance: 0, count: 3}
+        - {type: jeep, owner: agent, position: [7, 30], stance: 0, count: 2}
         # Hidden marker: a lone building in the eastern fog pocket,
         # well off the y=30..33 spawn rows so a fixed eastward charge
         # along spawn rows never reveals it.
@@ -95,8 +98,8 @@ levels:
       is far NE and only a deliberate split push reveals it in time.
     overrides:
       actors:
-        - {type: jeep, owner: agent, position: [5, 33], count: 3}
-        - {type: jeep, owner: agent, position: [7, 30], count: 2}
+        - {type: jeep, owner: agent, position: [5, 33], stance: 0, count: 3}
+        - {type: jeep, owner: agent, position: [7, 30], stance: 0, count: 2}
         # Decoy: passive enemy infantry parked OFF the egress lane
         # (high y, away from the scout corridor) — pure time-bait, not
         # an instant-kill wall.
@@ -132,12 +135,12 @@ levels:
     overrides:
       actors:
         # spawn_point 0 — scouts staged SW.
-        - {type: jeep, owner: agent, position: [5, 33], count: 3, spawn_point: 0}
-        - {type: jeep, owner: agent, position: [7, 30], count: 2, spawn_point: 0}
+        - {type: jeep, owner: agent, position: [5, 33], stance: 0, count: 3, spawn_point: 0}
+        - {type: jeep, owner: agent, position: [7, 30], stance: 0, count: 2, spawn_point: 0}
         # spawn_point 1 — scouts staged NW (markers are fixed, so the
         # reading order that works flips by seed).
-        - {type: jeep, owner: agent, position: [5, 6], count: 3, spawn_point: 1}
-        - {type: jeep, owner: agent, position: [7, 9], count: 2, spawn_point: 1}
+        - {type: jeep, owner: agent, position: [5, 6], stance: 0, count: 3, spawn_point: 1}
+        - {type: jeep, owner: agent, position: [7, 9], stance: 0, count: 2, spawn_point: 1}
         # Center decoys (already-explored zone) — time-bait only,
         # passive so they cannot instakill a passing scout.
         - {type: e1, owner: enemy, position: [55, 20], stance: 0, count: 3}