Enhance job initialization and progress tracking; update .gitignore to exclude cache directories

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

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

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