feat(api-input): expose timeout/interpolation, fix 422 on light turn-on

- coordinator.update_source now auto-injects source_type from cached data so
  the server's discriminated-union body validates (was rejecting
  fallback_color updates with 422).
- Add Fallback Timeout (number) and Interpolation (select) entities per
  api_input CSS source.
- Light no longer zeros fallback_color on turn_off; state restored across
  HA restarts via RestoreEntity so the chosen default color persists.
- Bump manifest to 0.2.2 and update en/ru translations.

custom_components/ledgrab/manifest.json

@@ -8,5 +8,5 @@
   "iot_class": "local_push",
   "issue_tracker": "https://git.dolgolyov-family.by/alexei.dolgolyov/ledgrab-haos-integration/issues",
   "requirements": ["aiohttp>=3.9.0"],
-  "version": "0.2.1"
+  "version": "0.2.2"
 }