Add Alembic migrations and initial DB schema for core objects #7
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… for core schema This change introduces Alembic-based migrations with an initial database schema for core objects, supporting future evolution and idempotent setup. It also integrates automatic migration execution into CLI startup for reliable DB initialization in all environments. - Add Alembic and SQLAlchemy 2.0+ as project dependencies - Scaffold Alembic config, env.py, migrations directory, and core models - Define initial migration for events, documents, chunks, entities, embeddings, jobs tables with indices and FKs (SQLite-optimized) - Apply SQLite PRAGMA settings (WAL, busy_timeout, synchronous) on connect - Integrate run_migrations on CLI startup (before serving) - Add seed/fixture helpers and migration/tests for core schema No breaking changes; existing SQLite data is preserved and future-proofed.
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Summary
This PR introduces Alembic database migrations to the project, setting up the initial database schema for core objects and integrating migrations into the app startup process.
Details
opencontext start) so tables are always up-to-date with no manual intervention required.