refactor: telegram + portfolio in-process (drop shared MCP)

Each bot now manages its own notification + portfolio aggregation:

* TelegramClient calls the public Bot API directly via httpx, reading
  CERBERO_BITE_TELEGRAM_BOT_TOKEN / CERBERO_BITE_TELEGRAM_CHAT_ID from
  env. No credentials → silent disabled mode.
* PortfolioClient composes DeribitClient + HyperliquidClient + the new
  MacroClient.get_asset_price/eur_usd_rate to expose equity (EUR) and
  per-asset exposure as the bot's own slice (no cross-bot view).
* mcp-telegram and mcp-portfolio removed from MCP_SERVICES / McpEndpoints
  and the cerbero-bite ping CLI; health_check no longer probes portfolio.

Docs (02/04/06/07) and docker-compose updated to reflect the new
architecture.

353/353 tests pass; ruff clean; mypy src clean.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/integration/test_recovery.py

@@ -115,11 +115,6 @@ async def test_recovery_cancels_awaiting_fill_when_broker_lacks_legs(
         url="http://mcp-deribit:9011/tools/get_positions",
         json=[],
     )
-    httpx_mock.add_response(
-        url="http://mcp-telegram:9017/tools/notify_system_error",
-        json={"ok": True},
-        is_reusable=True,
-    )
 
     await recover_state(ctx, now=_now())
 
@@ -154,11 +149,6 @@ async def test_recovery_alerts_on_open_position_missing_on_broker(
         url="http://mcp-deribit:9011/tools/get_positions",
         json=[],
     )
-    httpx_mock.add_response(
-        url="http://mcp-telegram:9017/tools/notify_system_error",
-        json={"ok": True},
-        is_reusable=True,
-    )
 
     await recover_state(ctx, now=_now())
     assert ctx.kill_switch.is_armed() is True