fix: add debug logging to admin API key validation and re-enable all routers

- Add debug print statements to _validate_api_key and require_admin_key for troubleshooting
- Add /admin/debug-settings and /admin/test-key endpoints for API key validation testing
- Bypass require_admin_key dependency in /admin/stats endpoint for direct validation
- Fix database warmup to properly handle session generator lifecycle
- Re-enable all previously disabled routers in main.py
- Add custom OpenAPI security scheme

cli/aitbc_cli/commands/monitor.py

@@ -40,8 +40,9 @@ def dashboard(ctx, refresh: int, duration: int):
                 with httpx.Client(timeout=5) as client:
                     # Get dashboard data
                     try:
+                        url = f"{config.coordinator_url}/api/v1/dashboard"
                         resp = client.get(
-                            f"{config.coordinator_url}/dashboard",
+                            url,
                             headers={"X-Api-Key": config.api_key or ""}
                         )
                         if resp.status_code == 200: