feat(V2): X-Bot-Tag header obbligatorio + endpoint /admin/audit con filtri

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

src/cerbero_mcp/__main__.py

@@ -15,6 +15,7 @@ from typing import Literal, cast
 import uvicorn
 from fastapi import FastAPI
 
+from cerbero_mcp import admin
 from cerbero_mcp.client_registry import ClientRegistry
 from cerbero_mcp.common.logging import configure_root_logging
 from cerbero_mcp.exchanges import build_client
@@ -62,6 +63,7 @@ def _make_app(settings: Settings) -> FastAPI:
     app.include_router(alpaca.make_router())
     app.include_router(macro.make_router())
     app.include_router(sentiment.make_router())
+    app.include_router(admin.make_admin_router())
 
     return app