QTZPOC-20

QTZPOC-20: Implement explicit joblib model flavor and enhance model import workflow with extensive E2E tests.

This commit introduces a first-class joblib model flavor for direct loading and saving of Python pickle artifacts, including custom code within the artifact's code/ directory, bypassing MLflow's flavor loaders. The model import workflow's status database configuration is now streamlined to default to the POSTGRES_* server, with explicit IMPORT_STATUS_DB_* overrides.

Comprehensive end-to-end tests have been added for the model import workflow, covering success paths, gate rejections, digest enforcement, provisioning failures, status record integrity, cleanup, and retry/recovery scenarios using a real-clock environment. New E2

e2e/test_import_model_gates.py

@@ -400,6 +400,10 @@ class TestGate5Extraction:
     and modes, not duplicates — and is refused here on the second member.
     """
 
+    # `zipfile` warns while *writing* the duplicate entry. That is the fixture doing exactly what
+    # this test needs, so it is silenced here rather than left to look like a problem — and scoped to
+    # this one test, so a duplicate name appearing anywhere else still gets noticed.
+    @pytest.mark.filterwarnings('ignore:Duplicate name:UserWarning')
     async def test_a_duplicate_member_is_rejected_at_extraction(
         self,
         import_status_table: Any,