fix: TMDB images on recommendations + Postgres movies seed on HF fast path

fix: like button, TMDB images, pipeline animation

sync: port TMDB enrichment, bootstrap fixes, frontend refactor from main

feat: MLOps eval, A/B testing, DLQ, WebSocket, cold-start fallback

updated frontend and solved bugs

fix: pg.acquire() not await pg.acquire() — PoolConnectionProxy not async ctx mgr

fix: API quality fixes (await redis, Kafka lifecycle, Prometheus dedup, lifespan)

feat: FastAPI service with Redis/Postgres/ALS fallback chain and Prometheus metrics