docs: sync documentation with current codebase

- Update event formatter count 23 -> 28 (add ping, workflow_job, status, deployment, check_suite)
- Document Telegram support end-to-end (routes, /gh commands, richheader, secrets)
- Fix route schema to use targets array and group fields (owners, emoji)
- Correct KV/D1 storage layout (msg:*, i18n:*, D1 links/send_logs)
- Note GITHUB_APP_ID/GITHUB_PRIVATE_KEY are unused; drop legacy DISCORD_CHANNEL_ID/PORT/CONFIG_PATH
- Remove stale Docker deployment section
- Update color table, branch filter compatibility, admin API endpoints
- AGENTS.md: add Documentation section requiring doc updates after functional changes

docs/guide/filters.md

@@ -90,6 +90,9 @@ Matches the branch involved in the event. What counts as "the branch" depends on
 | `pull_request` (and review) | The pull request's **head** (source) branch |
 | `create` / `delete`         | The created/deleted branch or tag           |
 | `workflow_run`              | The `head_branch` the workflow ran on       |
+| `workflow_job`              | The `head_branch` the job ran on            |
+| `check_suite`               | The `head_branch` of the check suite        |
+| `deployment`                | The deployment ref (strips `refs/heads/`)   |
 | `code_scanning_alert`       | The branch the alert belongs to             |
 
 ```json