Fix worker process path in run.py; add worker.py for dedicated worker handling

Refactor worker initialization in run.py to use subprocess for improved process management; add worker.py for dedicated worker handling

Update Dockerfile and run.py for improved environment configuration; enhance health check response in main.py

Refactor worker initialization in run.py for improved readability and connection handling

Update rq dependency version and refactor worker connection handling

Add logging and threading support for video encoding worker

Add initial implementation of video encoder pipeline with FastAPI and FFmpeg