feat(postbox): enforce unified inbox separation

tests/test_migration.py

@@ -42,6 +42,10 @@ class PostboxMigrationTests(unittest.TestCase):
             "govoplan_postbox.backend.migrations.versions."
             "a7c1e4f8b2d6_v016_protection_transitions"
         )
+        grouping_policy_migration = importlib.import_module(
+            "govoplan_postbox.backend.migrations.versions."
+            "d8b4f1a6c9e2_v017_grouping_policy"
+        )
         engine = create_engine("sqlite:///:memory:")
         try:
             with engine.begin() as connection:
@@ -54,6 +58,7 @@ class PostboxMigrationTests(unittest.TestCase):
                 scope_original = scope_migration.op
                 portal_original = portal_migration.op
                 transition_original = transition_migration.op
+                grouping_policy_original = grouping_policy_migration.op
                 migration.op = operations
                 route_migration.op = operations
                 occ_migration.op = operations
@@ -62,6 +67,7 @@ class PostboxMigrationTests(unittest.TestCase):
                 scope_migration.op = operations
                 portal_migration.op = operations
                 transition_migration.op = operations
+                grouping_policy_migration.op = operations
                 try:
                     migration.upgrade()
                     route_migration.upgrade()
@@ -71,6 +77,7 @@ class PostboxMigrationTests(unittest.TestCase):
                     scope_migration.upgrade()
                     portal_migration.upgrade()
                     transition_migration.upgrade()
+                    grouping_policy_migration.upgrade()
                     tables = set(inspect(connection).get_table_names())
                     self.assertIn("postboxes", tables)
                     self.assertIn("postbox_messages", tables)
@@ -110,6 +117,7 @@ class PostboxMigrationTests(unittest.TestCase):
                             "scope_structure_id",
                             "scope_relation_type_ids",
                             "portal_visible",
+                            "grouping_policy",
                         }.issubset(template_revision_columns)
                     )
                     self.assertIn("authoring_key", message_columns)
@@ -134,6 +142,7 @@ class PostboxMigrationTests(unittest.TestCase):
                     self.assertTrue(
                         {"execute_after", "processed_at"}.issubset(route_columns)
                     )
+                    grouping_policy_migration.downgrade()
                     transition_migration.downgrade()
                     portal_migration.downgrade()
                     scope_migration.downgrade()
@@ -158,6 +167,7 @@ class PostboxMigrationTests(unittest.TestCase):
                     scope_migration.op = scope_original
                     portal_migration.op = portal_original
                     transition_migration.op = transition_original
+                    grouping_policy_migration.op = grouping_policy_original
         finally:
             engine.dispose()