fix: prevent config mutation in MCP client URL retry logic

Fixed an issue where the MCP client was mutating the shared configuration
object's URL during retry attempts. This could cause configuration corruption
if the same config object was reused elsewhere.

Author: waleedlatif1

apps/sim/lib/mcp/client.ts

@@ -344,14 +344,16 @@ export class McpClient {
     ]
 
     let lastError: Error | null = null
+    const originalUrl = this.config.url
 
     for (const [index, url] of urlsToTry.entries()) {
       try {
         await this.attemptHttpRequest(request, url, index === 0)
 
         if (index > 0) {
-          logger.info(`[${this.config.name}] Updated URL from ${this.config.url} to ${url}`)
-          this.config.url = url
+          logger.info(
+            `[${this.config.name}] Successfully used alternative URL format: ${url} (original: ${originalUrl})`
+          )
         }
         return
       } catch (error) {