Phase 1: SQLite-Persistenz (WAL, Migrationen, Backup, Integritätscheck)

- hms_persistence: Database-Klasse nach §24
- WAL-Modus, Foreign Keys, kurze Transaktionen, Busy-Timeout
- Migrationen mit Backup vor Schemaänderung (§24.4)
- Integritätscheck beim Öffnen (§24.1)
- Projekt-/Einstellungs-/Plugin-Status-CRUD
- 18 Unit-Tests inkl. Altdaten-Migration und Reopen-Roundtrips

pyproject.toml

@@ -30,6 +30,7 @@ packages = [
     "packages/adaptive_quality/hms_adaptive",
     "packages/capabilities/hms_capabilities",
     "packages/plugin_sdk/hms_plugin_sdk",
+    "packages/persistence/hms_persistence",
     "apps/renderer/hms_renderer",
     "apps/control_server/hms_control_server",
     "apps/launcher/hms_launcher",