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/ScoreController.php

@@ -77,7 +77,7 @@ class ScoreController extends BaseController
         $this->gradingLockModel = new GradingLockModel();
         $this->missingScoreOverrideModel = new MissingScoreOverrideModel();
         // Retrieve the configuration values
-        $this->semester = $this->configModel->getConfig('semester');
+        $this->semester = getSemester();
         $this->schoolYear = $this->configModel->getConfig('school_year');
         $this->targetHigh = $this->configModel->getConfig('trophy_score');
         $this->targetLow = $this->configModel->getConfig('pass_score');
@@ -1030,7 +1030,7 @@ class ScoreController extends BaseController
         $fallStartCfg   = (string)($this->configModel->getConfig('fall_semester_start')   ?? '');
         $fallEndCfg     = (string)($this->configModel->getConfig('fall_end_date')     ?? ''); // e.g., 'YYYY-01-15'
         $springStartCfg = (string)($this->configModel->getConfig('spring_semester_start') ?? ''); // e.g., 'YYYY-01-16'
-        $springEndCfg   = (string)($this->configModel->getConfig('last_school_day')   ?? '');
+        $springEndCfg   = (string)($this->configModel->getConfig('last_day_of_school')   ?? '');
 
         if ($norm === 'fall') {
             $start = ($fallStartCfg !== '') ? date($y1 . '-m-d', strtotime($fallStartCfg)) : "{$y1}-09-01";