fix: unique violations

Directly using Psycopg error instead of the error code.

Also, raise all other IntegrityErrors instead of silently dropping them.

src/service/router.py

@@ -10,6 +10,7 @@ Endpoints:
 
 from fastapi import APIRouter, status
 from sqlalchemy.exc import IntegrityError
+from psycopg.errors import UniqueViolation
 
 from src.exceptions import ConflictException
 from src.database import db_dependency
@@ -110,10 +111,11 @@ async def register_service(
 		db.flush()
 	except IntegrityError as e:
 		if (
-			getattr(e.orig, "pgcode", None) == "23505"  # Postgres unique violation
+			isinstance(e.orig, UniqueViolation)  # Postgres unique violation
 			or "UNIQUE constraint failed" in str(e.orig)  # SQLite unique violation
 		):
 			raise ConflictException(message="Service with this name already exists")
+		raise
 	response = ServiceWithKeySchema(**service_model.__dict__)
 	db.commit()
 	return {"service": response}