fix: Register sync_all_accounts cron job on Sidekiq startup (#764)

* fix: Register sync_all_accounts cron job on Sidekiq startup

AutoSyncScheduler.sync! was only called when changing settings in the UI,
so the nightly sync job was never registered. Now it's initialized when
Sidekiq starts, ensuring accounts sync nightly as configured.

* Utilize existing configure_server block

---------

Co-authored-by: Pieter <ptr@arcsec.org>

config/initializers/sidekiq.rb

@@ -58,6 +58,14 @@ end
 
 Sidekiq.configure_server do |config|
   config.redis = redis_config
+
+  # Initialize auto-sync scheduler when Sidekiq server starts
+  config.on(:startup) do
+    AutoSyncScheduler.sync!
+    Rails.logger.info("[AutoSyncScheduler] Initialized sync_all_accounts cron job")
+  rescue => e
+    Rails.logger.error("[AutoSyncScheduler] Failed to initialize: #{e.message}")
+  end
 end
 
 Sidekiq.configure_client do |config|