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/SemesterRangeService.php

@@ -17,7 +17,7 @@ class SemesterRangeService
     public function getSchoolYearRange(string $schoolYear): array
     {
         $startCfg = (string)($this->configModel->getConfig('fall_semester_start') ?? '');
-        $endCfg   = (string)($this->configModel->getConfig('last_school_day') ?? '');
+        $endCfg   = (string)($this->configModel->getConfig('last_day_of_school') ?? '');
 
         $start = null;
         $end = null;
@@ -76,7 +76,7 @@ class SemesterRangeService
         $fallStartCfg   = (string)($this->configModel->getConfig('fall_semester_start')   ?? '');
         $fallEndCfg     = (string)($this->configModel->getConfig('fall_end_date')         ?? '');
         $springStartCfg = (string)($this->configModel->getConfig('spring_semester_start') ?? '');
-        $springEndCfg   = (string)($this->configModel->getConfig('last_school_day')       ?? '');
+        $springEndCfg   = (string)($this->configModel->getConfig('last_day_of_school')       ?? '');
 
         $md = static fn(string $cfg, int $year, string $fallback): string =>
             $cfg !== '' ? sprintf('%04d-%s', $year, date('m-d', strtotime($cfg))) : $fallback;
@@ -112,8 +112,7 @@ class SemesterRangeService
     {
         $fallStartCfg   = (string)($this->configModel->getConfig('fall_semester_start')   ?? '');
         $springStartCfg = (string)($this->configModel->getConfig('spring_semester_start') ?? '');
-        $lastDayCfg     = (string)($this->configModel->getConfig('last_school_day')
-            ?? $this->configModel->getConfig('last_day_of_school') ?? '');
+        $lastDayCfg     = (string)($this->configModel->getConfig('last_day_of_school') ?? '');
 
         try {
             $target = new DateTimeImmutable($date ?: 'now');