fix(ci): gate deploys on passing tags + fix markets feature flag test

- CI now creates v<pipeline_iid> tag after tests pass on master
- Supervisor fetches tags and only deploys when a newer tag is available;
  skips if already on latest or no tags exist
- Fix test_seeds_markets_enabled: markets is seeded disabled (enabled=0),
  test was asserting the wrong value

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

web/tests/test_feature_flags.py

@@ -117,7 +117,7 @@ class TestMigration0019:
         assert "description" in cols
         assert "updated_at" in cols
 
-    def test_seeds_markets_enabled(self, tmp_path):
+    def test_seeds_markets_disabled(self, tmp_path):
         db_path = str(tmp_path / "test.db")
         migrate(db_path)
         conn = sqlite3.connect(db_path)
@@ -125,7 +125,7 @@ class TestMigration0019:
             "SELECT enabled FROM feature_flags WHERE name = 'markets'"
         ).fetchone()
         conn.close()
-        assert row is not None and row[0] == 1
+        assert row is not None and row[0] == 0
 
     def test_seeds_payments_disabled(self, tmp_path):
         db_path = str(tmp_path / "test.db")