Add max_asset_data_size parameter to Telegram service

Introduces optional max_asset_data_size parameter (in bytes) to filter
out oversized photos and videos from Telegram notifications. Assets
exceeding the limit are skipped with a warning, preventing
PHOTO_INVALID_DIMENSIONS errors for large images (e.g., 26MP photos).

Changes:
- Add max_asset_data_size parameter to service signature
- Implement size checking for single photos/videos
- Filter oversized assets in media groups
- Update services.yaml, translations, and documentation

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

custom_components/immich_album_watcher/translations/en.json

@@ -186,6 +186,10 @@
                 "wait_for_response": {
                     "name": "Wait For Response",
                     "description": "Wait for Telegram to finish processing before returning. Set to false for fire-and-forget (automation continues immediately)."
+                },
+                "max_asset_data_size": {
+                    "name": "Max Asset Data Size",
+                    "description": "Maximum asset size in bytes. Assets exceeding this limit will be skipped. Leave empty for no limit."
                 }
             }
         }