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/services.yaml

@@ -116,3 +116,14 @@ send_telegram_notification:
       default: true
       selector:
         boolean:
+    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.
+      required: false
+      selector:
+        number:
+          min: 1
+          max: 52428800
+          step: 1048576
+          unit_of_measurement: "bytes"
+          mode: box