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/Controllers/View/CompetitionScoresController.php

@@ -244,7 +244,7 @@ class CompetitionScoresController extends BaseController
     {
         $userId = (int) (session()->get('user_id') ?? 0);
         $schoolYear = (string) ($this->configModel->getConfig('school_year') ?? '');
-        $semester = (string) ($this->configModel->getConfig('semester') ?? '');
+        $semester = (string) (getSemester() ?? '');
         $assignments = $this->teacherClassModel->getClassAssignmentsByUserId(
             $userId,
             $schoolYear,