M8-R15: fix HA discovery identities and thermal totals

tests/test_app.py

@@ -118,6 +118,35 @@ def test_app_start_seeds_missing_config_from_env_without_overwriting_existing_va
     reset_db_caches()
 
 
+def test_startup_initializes_fresh_legacy_discovery_cleanup_ledger(
+    tmp_path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    """The cleanup ledger exists before the expose UI can write its first toggle."""
+    import app.main as main
+
+    app_database_url = _prepare_app_db(tmp_path)
+    monkeypatch.setenv("APP_DATABASE_URL", app_database_url)
+    monkeypatch.setenv("AUTH_BOOTSTRAP_USERNAME", "admin")
+    monkeypatch.setenv("AUTH_BOOTSTRAP_PASSWORD", "test-password")
+    get_settings.cache_clear()
+    reset_db_caches()
+
+    main.ensure_auth_db_ready()
+
+    conn = sqlite3.connect(tmp_path / "app_ready.db")
+    try:
+        value = conn.execute(
+            "SELECT value FROM app_config WHERE key = ?",
+            ("HA_DISCOVERY_LEGACY_THERMAL_CLEANUP_V1",),
+        ).fetchone()[0]
+    finally:
+        conn.close()
+    assert value == '{"complete": true, "inventory": [], "topics": []}'
+
+    get_settings.cache_clear()
+    reset_db_caches()
+
+
 def test_app_start_syncs_app_hostname_from_env_even_when_db_has_old_value(
     tmp_path, monkeypatch: pytest.MonkeyPatch
 ) -> None: