Docs: sweep recent user-facing updates (#46424)

* Docs: document Telegram force-document sends

* Docs: note Telegram document send behavior

* Docs: clarify memory file precedence

* Docs: align default AGENTS memory guidance

* Docs: update workspace FAQ memory note

* Docs: document gateway status require-rpc

* Docs: add require-rpc to gateway CLI index

docs/cli/message.md

@@ -59,6 +59,7 @@ Name lookup:
   - Required: `--target`, plus `--message` or `--media`
   - Optional: `--media`, `--reply-to`, `--thread-id`, `--gif-playback`
   - Telegram only: `--buttons` (requires `channels.telegram.capabilities.inlineButtons` to allow it)
+  - Telegram only: `--force-document` (send images and GIFs as documents to avoid Telegram compression)
   - Telegram only: `--thread-id` (forum topic id)
   - Slack only: `--thread-id` (thread timestamp; `--reply-to` uses the same field)
   - WhatsApp only: `--gif-playback`
@@ -258,3 +259,10 @@ Send Telegram inline buttons:
 openclaw message send --channel telegram --target @mychat --message "Choose:" \
   --buttons '[ [{"text":"Yes","callback_data":"cmd:yes"}], [{"text":"No","callback_data":"cmd:no"}] ]'
 ```
+
+Send a Telegram image as a document to avoid compression:
+
+```bash
+openclaw message send --channel telegram --target @mychat \
+  --media ./diagram.png --force-document
+```