feat: implement CRUD API endpoints for user stream bookmarks

[T-kesh]

This PR implements the personal stream markers API, enabling viewers to save private bookmarks at specific timestamps during VOD playback. The new endpoints, located under app/api/routes-f/stream/markers/, allow users to fetch their own markers for a specific recording, add new markers with optional notes (up to 100 characters), and delete existing ones by ID. To ensure a performant and reliable experience, the implementation enforces a limit of 50 markers per user per recording and leverages server-side session verification for strict privacy. Additionally, the routes include self-contained database initialization logic to automatically manage the stream_markers table and indices, ensuring the feature is fully standalone and easy to deploy.
closes #522

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[T-kesh]

@davedumto Please review this
Also if you have any other issue available, I'd like to work on them

[T-kesh]

@davedumto Please review this

[T-kesh]

@davedumto Kindly review