docs: update docs for Telegram integration

ROADMAP.md

@@ -129,7 +129,7 @@
 - [x] Plugin command unit tests (encode, hash, dns, cidr, defang)
 - [x] CI pipeline (Gitea Actions, Python 3.11-3.13, ruff + pytest)
 
-## v2.1.0 -- Teams Integration
+## v2.1.0 -- Teams + Telegram Integration
 
 - [x] Microsoft Teams adapter via outgoing webhooks (no SDK)
 - [x] `TeamsBot` class with same plugin API as IRC `Bot`
@@ -139,6 +139,13 @@
 - [x] IRC-only methods as no-ops (join, part, kick, mode, set_topic)
 - [x] Incoming webhook support for `send()` (proactive messages)
 - [x] Paste overflow via FlaskPaste (same as IRC)
-- [ ] Adaptive Cards for richer formatting
-- [ ] Graph API integration for DMs and richer channel access
+- [x] Teams `send()` routed through SOCKS5 proxy (bug fix)
+- [x] Telegram adapter via long-polling (`getUpdates`, no SDK)
+- [x] `TelegramBot` class with same plugin API as IRC `Bot`
+- [x] `TelegramMessage` dataclass duck-typed with IRC `Message`
+- [x] All Telegram HTTP through SOCKS5 proxy
+- [x] Message splitting at 4096-char limit
+- [x] `@botusername` suffix stripping in groups
+- [ ] Adaptive Cards for richer formatting (Teams)
+- [ ] Graph API integration for DMs and richer channel access (Teams)
 - [ ] Teams event handlers (member join/leave)