Begin to establish 1:1 mapping between media_id (xklb-metadata.db) <-> Calibre-Web's book_id (metadata.db)

[deldesir]

This pull request aims to initiate the process of creating a one-to-one mapping between the media_id in xklb-metadata.db and the book_id in Calibre-Web's metadata.db. This enhancement is crucial for maintaining synchronization across the databases, enabling accurate search results based on media entries' captions and their corresponding book records.

Key changes introduced in this pull request include:

• Mapping Functions: Initial implementation of functions to handle the creation and management of mappings between media_id and book_id. These functions ensure that each media entry in xklb-metadata.db is accurately linked to its corresponding book record in metadata.db.
• Database Queries: Updates to database queries to incorporate the new mapping logic in the search feature, ensuring that operations do not lead to false positives.

This update builds on the foundation laid in previous pull requests (#244 and #256) and aims to enhance the overall structure and maintainability of the codebase.

• [x] Tested on Ubuntu 24.04

[avni]

@deldesir indicates that this PR will need to be changed and use iiab-glue.db because of the DB refactoring we have been discussing so that we map books and media and also minimize impact due to upstream impact. 🚀

[deldesir]

How to test

• Pull the PR following How do I test a pull request (PR) ? instructions.
• The tests that validate PRs https://github.com/iiab/calibre-web/pull/263 and https://github.com/iiab/calibre-web/pull/254 also validate this PR.