Use logger.exit in expire-deleted user/project scripts (#36169)

* add logger.exit method to avoid logs being lost by process.exit

* use logger.exit in expire deleted projects and users scripts

* improve comment for EXIT_DELAY

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* convert to async

* await logger.exit in expire deleted projects and users scripts

---------

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
GitOrigin-RevId: 020d5cc2755871e5343130029706fe3b1c8e15ee

libraries/logger/logging-manager.js

@@ -1,4 +1,5 @@
 const Stream = require('node:stream')
+const { setTimeout } = require('node:timers/promises')
 const bunyan = require('bunyan')
 const GCPManager = require('./gcp-manager')
 const Serializers = require('./serializers')
@@ -11,6 +12,9 @@ const {
   setLogger: setValidationToolsLogger,
 } = require('@overleaf/validation-tools')
 
+// Delay (ms) before exiting to allow final logs to be flushed.
+const EXIT_DELAY = 500
+
 const LoggingManager = {
   /**
    * @param {string} name - The name of the logger
@@ -100,6 +104,16 @@ const LoggingManager = {
     this.logger.fatal(attributes, message)
   },
 
+  /**
+   * Exit after a delay to ensure that log messages are flushed
+   * @param {number} code
+   */
+
+  async exit(code) {
+    await setTimeout(EXIT_DELAY)
+    process.exit(code)
+  },
+
   _getOutputStreamConfig() {
     switch (process.env.LOGGING_FORMAT) {
       case 'gke': {