fix: mutate prefixContext object instead of reassigning for closure correctness

src/auto-reply/reply/reply-dispatcher.ts

@@ -75,14 +75,6 @@ function normalizeReplyPayloadInternal(
   // Prefer dynamic context provider over static context
   const prefixContext = opts.responsePrefixContextProvider?.() ?? opts.responsePrefixContext;
 
-  // Debug logging for prefix template resolution
-  if (opts.responsePrefix?.includes("{")) {
-    // eslint-disable-next-line no-console
-    console.log(
-      `[prefix-debug] normalizing with context: ${JSON.stringify(prefixContext)} prefix: ${opts.responsePrefix}`,
-    );
-  }
-
   return normalizeReplyPayload(payload, {
     responsePrefix: opts.responsePrefix,
     responsePrefixContext: prefixContext,