Documents the new apps.exec tool alongside apps.logs and adds a troubleshooting cookbook covering the common failure patterns we've seen in the wild: missing migrations, silent apps.update reroutes, 502s on compose domains, healthcheck timeouts, and how to use apps.exec as the platform's escape hatch for in-container inspection. Bumps MCP version to 2.2.0 in the changelog and bumps the vibn-frontend submodule to ship the apps.exec implementation. Also includes setup-vibn-logs-user.sh (the script that installs the locked-down SSH user on the Coolify host) which was already running in production but not yet committed. Made-with: Cursor