Fix semester context, attendance rosters, and billing workflows

- load global semester helpers consistently and use date-based semester defaults
- fix grading and daily attendance duplicate student/section rows
- keep attendance violations scoped to the current semester by default
- update invoice, refund, discount, payment, and financial aid flows
- add configuration cleanup migrations for duplicate calendar/semester keys
- refresh parent registration/report-card and print request handling
- update related models, services, views, cron notes, and test coverage

app/Config/Autoload.php

@@ -98,6 +98,6 @@ class Autoload extends AutoloadConfig
      *
      * @var list<string>
      */
-    public $helpers = ['url', 'form', 'pbkdf2', 'document', 'time', 'api']; 
+    public $helpers = ['url', 'form', 'pbkdf2', 'document', 'time', 'api', 'global_config']; 
     
 }