refactor(storage): route project DSNs and remove legacy backends

tests/unit/test_metadata_repository_dsn_decrypt.py

@@ -6,7 +6,10 @@ from uuid import uuid4
 import pytest
 from cryptography.fernet import InvalidToken
 
-from app.infra.db.metadb.repositories.metadata_repository import MetadataRepository
+from app.infra.db.metadb.repositories.metadata_repository import (
+    MetadataRepository,
+    _normalize_postgres_dsn,
+)
 
 
 class _DummyResult:
@@ -124,6 +127,12 @@ def test_encrypted_dsn_decrypts_without_migration(monkeypatch):
     session.commit.assert_not_awaited()
 
 
+def test_psycopg_sqlalchemy_dsn_is_normalized_for_direct_psycopg_clients():
+    assert _normalize_postgres_dsn(
+        "postgresql+psycopg://user:secret@db.example/project"
+    ) == "postgresql://user:secret@db.example/project"
+
+
 def test_upsert_project_database_config_encrypts_plaintext_dsn(monkeypatch):
     project_id = uuid4()
     session = SimpleNamespace(