Merge branch 'main' into copilot/add-conditional-routing

Resolve conflicts in app/api/__init__.py and app/models.py.
Renumber migration 027_add_routing_rules → 035_add_routing_rules.
Fix migration chain: down_revision → 034_add_user_profile_settings.
Add PipelineRoutingRule to migrations/env.py.

tests/conftest.py

@@ -61,6 +61,8 @@ from app.main import app as fastapi_app  # noqa: E402
 # Import models to register them with SQLAlchemy Base
 from app.models import (  # noqa: F401, E402
     ApiToken,
+    AuditLog,
+    ComplianceTemplate,
     DocumentMetadata,
     FileRecord,
     Pipeline,