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/Services/SemesterScoreService.php

@@ -32,7 +32,9 @@ class SemesterScoreService
         $this->semesterScoreModel = $semesterScoreModel;
         $this->configModel        = $configModel;
 
-        $this->semester   = (string) $this->configModel->getConfig('semester');
+        require_once APPPATH . 'Helpers/global_config_helper.php';
+
+        $this->semester   = (string) \getSemester();
         $this->schoolYear = (string) $this->configModel->getConfig('school_year');
 
         // Default actor from session (can be overridden later)