fix: idempotent Caddy subpath config, increase Docker pull timeout to 120s, extend health check to 60s

- helpers.js: treat 'No changes to apply' as success (config already exists = idempotent)
- constants.js: Docker pull timeout 30s → 120s (large images need more time)
- deploy.js: health check 40s → 60s (some apps like filebrowser are slow to start)

dashcaddy-api/routes/apps/deploy.js

@@ -306,7 +306,7 @@ module.exports = function({ docker, caddy, credentialManager, servicesStateManag
       } else {
         containerId = await deployContainer(appId, config, template);
         log.info('deploy', 'Container deployed', { containerId });
-        await helpers.waitForHealthCheck(containerId, template.healthCheck, config.port || template.defaultPort);
+        await helpers.waitForHealthCheck(containerId, template.healthCheck, config.port || template.defaultPort, 30);
         log.info('deploy', 'Container is healthy', { containerId });
       }