Add chat_action parameter to send_telegram_notification service

Shows typing/upload indicator while processing media. Supports:
typing, upload_photo, upload_video, upload_document actions.
Set to empty string to disable. Default: typing.

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

custom_components/immich_album_watcher/services.yaml

@@ -238,3 +238,21 @@ send_telegram_notification:
       default: false
       selector:
         boolean:
+    chat_action:
+      name: Chat Action
+      description: Chat action to display while processing (typing, upload_photo, upload_video, upload_document). Set to empty to disable.
+      required: false
+      default: "typing"
+      selector:
+        select:
+          options:
+            - label: "Typing"
+              value: "typing"
+            - label: "Uploading Photo"
+              value: "upload_photo"
+            - label: "Uploading Video"
+              value: "upload_video"
+            - label: "Uploading Document"
+              value: "upload_document"
+            - label: "Disabled"
+              value: ""