Fix models ordering for CI

Fix pytest test discovery

Fix CI workflow completely

Add test dependencies

Ensure pytest installed in CI

Add pytest to requirements

Add GitHub Actions CI

Fix tickets routes and add get-by-id

Return total count with paginated ticket list

Add search and pagination for tickets

Ignore database file

Remove database file from repository

Add SQLite persistence with SQLAlchemy

Add ticket fields, status update, filtering, and refactor structure

Add get-by-id and delete endpoints