Add server timeout configuration and improve error handling for script save operations

- Configure HTTP server timeouts (requestTimeout: 5min, headersTimeout: 2min, keepAliveTimeout: 65s)
- Add better error logging in PUT /scripts endpoint
- Improve writeFileWithLock error handling with descriptive messages and proper cleanup
- Ensure lock is always released even on error

Co-authored-by: whyour <22700758+whyour@users.noreply.github.com>

back/services/http.ts

@@ -16,6 +16,17 @@ export class HttpServerService {
           metricsService.record('http_service_start', 1, {
             port: port.toString(),
           });
+          
+          // Set server timeouts to prevent premature connection drops
+          if (this.server) {
+            // Timeout for receiving the entire request (including body) - 5 minutes
+            this.server.requestTimeout = 300000;
+            // Timeout for headers - 2 minutes  
+            this.server.headersTimeout = 120000;
+            // Keep-alive timeout - 65 seconds (slightly more than typical load balancer timeout)
+            this.server.keepAliveTimeout = 65000;
+          }
+          
           resolve(this.server);
         });