feat: flow engine data layer with tests

- SQLModel tables: flow_definitions/versions/runs, approval_tasks
- Alembic setup with autogenerate (sqlmodel types fixed via script.py.mako)
- Settings extended (shared root .env), db engine/session helpers
- pytest suite: conftest with isolated test DB, 5 model tests green
This commit is contained in:
Jonas Miederer 2026-09-06 22:28:53 +00:00
parent 2ba062c4c5
commit e178ae406d
12 changed files with 686 additions and 3 deletions

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Generic single-database configuration.