Extend the notification system with a third channel (telegram) alongside existing in_app and push channels. Add `telegram_enabled` column to `notification_preferences` table, update `NOTIFICATION_CHANNELS` and `_NOTIFICATION_CHANNEL_COLUMNS` mappings, and set telegram default to off (`_NOTIFICATION_CHANNEL_DEFAULTS`). Create `telegram_outbox` table with columns for uid, user_uid, chat_id, text, status, attempts, created_at, and sent_at, plus an index on status/id for efficient polling. Register `TelegramOutboxService` in the service manager lifecycle. Update API documentation strings to describe the new channel and its pairing requirement. Extend admin notification defaults view to include telegram column. Pass `notif_telegram_paired` flag to profile template based on `telegram_store.is_paired()` check. Update `NotificationPrefForm` and `NotificationDefaultForm` model literals to accept "telegram" as a valid channel value.
- Fix audit event names in CLI prune/clear commands from `cli.seo.*` to `cli.seo_meta.*`
- Refactor `_delete_attachment_file` to accept full attachment dict instead of storage_path string, using directory and stored_name fields with ATTACHMENTS_DIR
- Add `safe_next` validation for referer header in validation error redirect and media redirect
- Add `is_active` check in login router to reject deactivated accounts with "Account is deactivated" error
- Replace raw `request.headers.get("Referer")` with `redirect_back()` utility in bookmarks, polls, reactions, and votes routers
- Move `mark_conversation_read` call from `get_conversation_messages` to `messages_page` to avoid side effects during message retrieval
- Fix poll audit link to use `option.get("label")` instead of `option.get("text")`
- Add `VOTABLE` set validation in votes router to reject invalid target types with 400 response
- Strip control characters (0x00-0x20) from URLs in `_safe_url` instead of simple strip
- Add `__getattr__` fallback in services `__init__.py` for dynamic attribute access
- Add comprehensive documentation for backend content rendering in AGENTS.md, detailing the new `render_content` and `render_title` Jinja globals built on mistune with media processing, emoji shortcodes, and XSS protection
- Document the `X-Response-Time` header and bottom-left render time indicator in README.md
- Update bot token pricing documentation to clarify fallback vs gateway cost headers
- Add `email_accounts` to soft-delete tables and `idx_users_role` composite index in database schema
- Implement `telegram_pairings` and `telegram_links` table creation with column migration and indexes
- Add `/profile/{username}/telegram` endpoint to docs API with request/unpair actions
- Register `TelegramService` in main.py lifespan and add `response_timing` middleware emitting `X-Response-Time` header
- Introduce `TelegramPairForm` model and `guard_public_host_sync` synchronous host validation function
retoor