Chiusura fase di ristrutturazione e modularizzazione del workflow per favorire sviluppo modulare

harness/tests/test_schema_columns_cmd.py

@@ -1,5 +1,5 @@
 import json
-from datetime import datetime
+from datetime import UTC, datetime
 
 from typer.testing import CliRunner
 
@@ -9,7 +9,7 @@ from tht.mschema.models import ColumnPhysical, PhysicalSchema, TablePhysical
 
 def _write_catalog(tmp_path):
     phys = PhysicalSchema(
-        database="d", schema="s", introspected_at=datetime(2026, 1, 1),
+        database="d", schema="s", introspected_at=datetime(2026, 1, 1, tzinfo=UTC),
         tables={
             "dim_patient": TablePhysical(
                 comment="Anagrafica",
@@ -48,7 +48,7 @@ def _write_family_catalog(tmp_path):
         )
 
     phys = PhysicalSchema(
-        database="d", schema="s", introspected_at=datetime(2026, 1, 1),
+        database="d", schema="s", introspected_at=datetime(2026, 1, 1, tzinfo=UTC),
         tables={
             "fact_sost_impianto_pmk": _t("Sost PMK"),
             "fact_sost_impianto_crt_d": _t("Sost CRT-D"),