feat(curriculum): adaptive difficulty for telemetry, masking, and secondary failures

feat(env): add curriculum, challenge generation, coalition, and black-swan mechanics

feat(env): add robustness, uncertainty consensus, and partial observability

Add Fleet supervisor-worker delegation layer with /delegate API and tests

Add cascade scenario, injector phases, and CascadeTask

Upgrade Flight Recorder payload to PyTorch 2.5 schema

Rewrite telemetry with deterministic NCCL subsystem log engine

feat: implement cluster state machine, failure injector, telemetry