This commit introduces a major architectural overhaul, migrating the data backend from a flat JSON
file to a relational MySQL database.
- Replaced multiple scraping scripts with a unified `main.py` that handles crawling, parsing, and
database synchronization.
- Introduced `mysql_helper.py` for robust database interaction with a connection pool.
- Added `queries.sql` defining the new database schema for assets, categories, tags, and changelogs.
- Removed all obsolete frontend code (v1, v2) and old scraping scripts.
This change provides a more scalable and maintainable foundation for managing asset data.
