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/unit/test_mcp_endpoints.py

@@ -16,7 +16,7 @@ from cerbero_bite.config.mcp_endpoints import (
 
 def test_defaults_match_known_docker_dns() -> None:
     assert DEFAULT_ENDPOINTS["deribit"] == "http://mcp-deribit:9011"
-    assert DEFAULT_ENDPOINTS["telegram"] == "http://mcp-telegram:9017"
+    assert DEFAULT_ENDPOINTS["sentiment"] == "http://mcp-sentiment:9014"
 
 
 def test_load_endpoints_uses_defaults_when_env_empty() -> None:
@@ -72,5 +72,7 @@ def test_load_token_raises_when_file_empty(tmp_path: Path) -> None:
 
 
 def test_mcp_services_table_is_complete() -> None:
-    expected = {"deribit", "hyperliquid", "macro", "sentiment", "telegram", "portfolio"}
+    # Telegram and Portfolio are now in-process and must NOT be listed
+    # as shared MCP services.
+    expected = {"deribit", "hyperliquid", "macro", "sentiment"}
     assert set(MCP_SERVICES) == expected