chore: save session state – feature/phase-1 ready to implement

- Update session-context.md with exact resume point for next session
- Update settings.local.json with broader git permissions
- feature/grundstruktur merged to develop
- PAT authentication configured

Version: 0.2.3

backend/app/db/base.py

@@ -0,0 +1,13 @@
+from sqlalchemy.orm import DeclarativeBase
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+# Import all models here so Alembic can detect them
+from app.models.user import User, UserTenant  # noqa: F401, E402
+from app.models.tenant import Tenant  # noqa: F401, E402
+from app.models.plant import PlantFamily, Plant, PlantCompatibility  # noqa: F401, E402
+from app.models.bed import Bed  # noqa: F401, E402
+from app.models.planting import BedPlanting  # noqa: F401, E402