test: add integration tests for script template permissions and share endpoint

Also fix conftest.py to support DATABASE_TEST_URL env var for Docker test runs.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/tests/conftest.py

@@ -20,7 +20,13 @@ from app.core.config import settings
 settings.REQUIRE_INVITE_CODE = False
 
 # Test database URL (separate from production)
-TEST_DATABASE_URL = "postgresql+asyncpg://postgres:postgres@localhost:5432/patherly_test"
+# Use DATABASE_TEST_URL env var if set (e.g. inside Docker where host is 'db'),
+# otherwise fall back to localhost for local development.
+import os
+TEST_DATABASE_URL = os.environ.get(
+    "DATABASE_TEST_URL",
+    "postgresql+asyncpg://postgres:postgres@localhost:5432/patherly_test",
+)
 
 
 @pytest.fixture(scope="session")