KAPO self-heal fix: conversational HF fallback

KAPO rollout fix: HF chat completion fallback

KAPO rollout fix: HF generation fallback

KAPO rollout fix: sync brain_server/api/main.py

KAPO specialist chat fix

KAPO hf runtime finalizer

KAPO transformers runtime rollout

KAPO modernization rollout

Enable HF inference fallback when local model is unavailable

Initial modernized KAPO runtime upload