🧹 add dynamic toggling for job scheduling using environment variables

- Updated `find_or_schedule_jobs` to dynamically include jobs based on environment variables.
- Introduced the following environment flags to control job scheduling:
  - `ENABLE_BATCH_EMAIL` for `BatchEmailNotificationJob`
  - `ENABLE_DEPOSITOR_EMAIL` for `DepositorEmailNotificationJob`
  - `ENABLE_USER_STAT` for `UserStatCollectionJob`
- This allows buggy jobs to be disabled temporarily without modifying the codebase.
- Default behavior ensures only non-buggy jobs are scheduled when flags are not set.

app/models/account.rb

@@ -176,15 +176,21 @@ def find_job(klass)
   def find_or_schedule_jobs
     account = Site.account
     AccountElevator.switch!(self)
-    [
+
+    jobs_to_schedule = [
       EmbargoAutoExpiryJob,
-      LeaseAutoExpiryJob,
-      BatchEmailNotificationJob,
-      DepositorEmailNotificationJob,
-      UserStatCollectionJob
-    ].each do |klass|
+      LeaseAutoExpiryJob
+    ]
+
+    # Add conditional checks based on a config or environment variable
+    jobs_to_schedule << BatchEmailNotificationJob if ENV['ENABLE_BATCH_EMAIL'] == 'true'
+    jobs_to_schedule << DepositorEmailNotificationJob if ENV['ENABLE_DEPOSITOR_EMAIL'] == 'true'
+    jobs_to_schedule << UserStatCollectionJob if ENV['ENABLE_USER_STAT'] == 'true'
+
+    jobs_to_schedule.each do |klass|
       klass.perform_later unless find_job(klass)
     end
+
     account ? AccountElevator.switch!(account) : reset!
   end
 end