Fix All: Cleaned All Files

Fix easy task seed D0↔D1 so dumb greedy targets wrong district; fix signal thresholds

Fix: D0 seed above threshold, faster hospital drain, containment as primary metric

Fix treatment/recovery calibration, hospital breach reward, efficiency grader, recalibrate seeds

Fix speed score bug, restore partial resource replenishment, raise easy seed

Fix resource replenishment, grader efficiency, seed calibration, prompt strategy

Initial submission: Cascade Containment