fix(knowledge): improve upload workflow and seed manufacturers

backend/hermes/app/main.py

@@ -20,6 +20,7 @@ from app.api.users import router as users_router
 from app.db.database import SessionLocal
 from app.db.health import check_database
 from app.core.logging import configure_logging
+from app.knowledge_seed import seed_knowledge_manufacturers
 from app.rbac.seed import seed_rbac
 from app.services.initial_admin_bootstrap import bootstrap_initial_admin
 
@@ -76,6 +77,7 @@ def startup_seed_rbac():
     db = SessionLocal()
     try:
         seed_rbac(db)
+        seed_knowledge_manufacturers(db)
         bootstrap_initial_admin(db)
     finally:
         db.close()