fix(logger): annotate singleton logger export comment for build verification

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@serve.zone/dcrouter',
-  version: '11.0.19',
+  version: '11.0.20',
   description: 'A multifaceted routing service handling mail and SMS delivery functions.'
 }

ts/logger.ts

@@ -94,5 +94,5 @@ class StandardLogger {
   }
 }
 
-// Export a singleton instance
+// Export a singleton instance (build verification)
 export const logger = new StandardLogger();