fixes : rewards and training

fix(N1-N6): unblock SUBMIT_TO_FDA, harden episode lifecycle, add tests

V4: fix 5 critical + 8 major + 2 moderate issues

fix: G26 wire trainer.train(), G23 fix episode_phase progression

[Push 5] Suyash: adaptive curriculum, dashboard backend, hardening

Push 3: Curriculum controller, hidden-state pipeline, phase detector, trial judge, and full EpisodeManager wiring

Push 2: Rule-Engine, Reward Components, Episode Logging, Noise Model

refactor(env): rename environment/ to server/, add openenv.yaml, fix Dockerfile base image