Update Dockerfile to set PYTHONPATH; fix import path for RedisConfig in worker.py

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

Fix import path for encode_video_task in main.py; add __init__.py and version.py for package initialization and versioning

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 Redis connection handling in config.py and improve startup logging in main.py

Update Dockerfile to install FFmpeg and implement output directory cleanup in video encoding task

Add logging and threading support for video encoding worker

Refactor Redis connection handling and update Dockerfile for environment variable support

Add initial implementation of video encoder pipeline with FastAPI and FFmpeg