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_monitor_cycle.py

@@ -231,11 +231,6 @@ async def test_monitor_closes_position_on_profit_take(
         },
         is_reusable=True,
     )
-    httpx_mock.add_response(
-        url="http://mcp-telegram:9017/tools/notify_position_closed",
-        json={"ok": True},
-        is_reusable=True,
-    )
 
     res = await run_monitor_cycle(ctx, now=now)
     assert len(res.outcomes) == 1
@@ -296,11 +291,6 @@ async def test_monitor_uses_dvol_history_for_return_4h(
         },
         is_reusable=True,
     )
-    httpx_mock.add_response(
-        url="http://mcp-telegram:9017/tools/notify_position_closed",
-        json={"ok": True},
-        is_reusable=True,
-    )
 
     res = await run_monitor_cycle(ctx, now=now)
     assert res.outcomes[0].action == "CLOSE_AVERSE"