[asimawdah]

Why

Introduce automated validation for the OpenKey Server to catch Python syntax errors, dependency conflicts, and Docker build failures before changes are merged.

What changed

• Added a GitHub Actions workflow using Python 3.12.
• Trigger CI on pushes and pull requests targeting "main".
• Install project dependencies from "requirements.txt".
• Compile Python application modules using "python -m compileall".
• Validate installed dependencies using "pip check".
• Build the production Docker image.
• Added read-only workflow permissions.
• Added concurrency controls to cancel outdated workflow runs.
• Added manual workflow execution support.

Versioning

• Breaking protocol change
• Breaking TS/JS API change

No API endpoints, authentication behavior, database schema, or application logic were changed.