Fix MCP health check port in custom-base-port workflow

Custom port prefix is 67 so MCP runs on 6744, not 6742.

Author: mantrakp04

.github/workflows/e2e-custom-base-port-api-tests.yaml

@@ -123,7 +123,7 @@ jobs:
         with:
           run: pnpm run start:mcp --log-order=stream &
           wait-on: |
-            http://localhost:6742/health
+            http://localhost:6744/health
           tail: true
           wait-for: 30s
           log-output-if: true