Fix: FLEET routes front-inserted after frontier patch so they win over SPA catch-all

The killinchu_frontier_patch.register() does routes.clear()+extend which reordered the FLEET (vessels) routes behind the /{full_path:path} catch-all, causing /api/killinchu/v1/fleet/* to 404. Re-register the 8 FLEET routes (vessels, forecast-modules, predictive-maintenance, compliance-certificates, port-state-deficiencies, ai-briefings, all, voyage-risk) at position 0 of app.router.routes AFTER the frontier patch runs, guaranteeing precedence. ADDITIVE, no mocks, data served verbatim from embedded platform seed-data.

serve.py

@@ -2462,3 +2462,64 @@ except Exception as _killinchu_dag_e:
 # ============================================================================
 # END: /khipu/dag ALIAS — killinchu
 # ============================================================================
+
+
+# ============================================================================
+# FLEET (Vessels) FRONT-INSERT — runs LAST, after killinchu_frontier_patch's
+# routes.clear()+extend, so the FLEET routes are guaranteed to sit AHEAD of the
+# /{full_path:path} SPA catch-all (which 404s anything under api/). The earlier
+# include_router at ~line 1689 is harmless; this re-inserts the same routes at
+# position 0 to win precedence on the HF runtime. ADDITIVE ONLY. NO mocks.
+# ============================================================================
+try:
+    import sys as _fleet2_sys
+    from fastapi.routing import APIRoute as _Fleet2Route
+    from fastapi.responses import JSONResponse as _Fleet2JR
+    import killinchu_fleet_vessels as _fleet2
+    _fleet2_data = _fleet2._load()
+    _FLEET2_LABEL = _fleet2.HONESTY_LABEL
+    _fleet2_base = "/api/killinchu/v1/fleet"
+
+    def _fleet2_make(key):
+        async def _h() -> _Fleet2JR:
+            return _Fleet2JR({"data": _fleet2_data.get(key, []),
+                              "honesty": _FLEET2_LABEL, "source_key": key})
+        return _h
+
+    async def _fleet2_all() -> _Fleet2JR:
+        return _Fleet2JR({"datasets": _fleet2_data,
+            "counts": {k: (len(v) if isinstance(v, list) else None)
+                       for k, v in _fleet2_data.items()},
+            "honesty": _FLEET2_LABEL,
+            "source": "github.com/szl-holdings/platform seed-data/vessels/*"})
+
+    async def _fleet2_voyage() -> _Fleet2JR:
+        return _Fleet2JR(_fleet2.voyage_risk_loop())
+
+    _fleet2_specs = [
+        ("/vessels", _fleet2_make("vessels"), "fleet_vessels"),
+        ("/forecast-modules", _fleet2_make("forecast-modules"), "fleet_forecast_modules"),
+        ("/predictive-maintenance", _fleet2_make("predictive-maintenance"), "fleet_predictive_maintenance"),
+        ("/compliance-certificates", _fleet2_make("compliance-certificates"), "fleet_compliance_certificates"),
+        ("/port-state-deficiencies", _fleet2_make("port-state-deficiencies"), "fleet_port_state_deficiencies"),
+        ("/ai-briefings", _fleet2_make("ai-briefings"), "fleet_ai_briefings"),
+        ("/all", _fleet2_all, "fleet_all"),
+        ("/voyage-risk", _fleet2_voyage, "fleet_voyage_risk"),
+    ]
+    _fleet2_names = {n for _, _, n in _fleet2_specs}
+    # Drop any prior copies (from the early include_router) to avoid duplicates.
+    app.router.routes[:] = [r for r in app.router.routes
+                            if getattr(r, "name", "") not in _fleet2_names]
+    _fleet2_new = [_Fleet2Route(f"{_fleet2_base}{p}", h, methods=["GET"], name=n)
+                   for p, h, n in _fleet2_specs]
+    for _r in reversed(_fleet2_new):
+        app.router.routes.insert(0, _r)
+    print(f"[killinchu] FLEET front-insert OK: {len(_fleet2_new)} routes ahead of catch-all",
+          file=_fleet2_sys.stderr)
+except Exception as _fleet2_e:
+    import sys as _fleet2_sys, traceback as _fleet2_tb
+    print(f"[killinchu] FLEET front-insert FAILED: {_fleet2_e!r}", file=_fleet2_sys.stderr)
+    _fleet2_tb.print_exc(file=_fleet2_sys.stderr)
+# ============================================================================
+# END: FLEET (Vessels) FRONT-INSERT
+# ============================================================================