fix: unique violations

Directly using Psycopg error instead of the error code.

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

src/organisation/router.py

@@ -18,10 +18,11 @@ Endpoints:
 
 from datetime import datetime, timezone
 from typing import Annotated
+from sqlalchemy.exc import IntegrityError
+from psycopg.errors import UniqueViolation
 
 from fastapi import APIRouter, status
 from fastapi.params import Query
-from sqlalchemy.exc import IntegrityError
 
 from src.contact.schemas import ContactModel
 from src.exceptions import (
@@ -175,12 +176,13 @@ async def create_org(
 		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="Organisation with this name already exists"
 			)
+		raise
 	# Adds currently logged-in user to org users list and sets them as root_user
 	org_model.user_rel.append(user_model)
 	org_model.root_user_rel = user_model