fix(migration): use BIGINT UNSIGNED for FK columns matching parent tables

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

database/migrations/Phase_99_006_hr_weekly_schedules_and_job_descriptions.php

@@ -4,8 +4,8 @@ declare(strict_types=1);
 return [
     'up' => "
 CREATE TABLE IF NOT EXISTS hr_weekly_schedules (
-    id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
-    employee_profile_id INT UNSIGNED NOT NULL,
+    id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+    employee_profile_id BIGINT UNSIGNED NOT NULL,
     day_of_week ENUM('saturday','sunday','monday','tuesday','wednesday','thursday','friday') NOT NULL,
     shift_id INT UNSIGNED NULL,
     start_time TIME NULL,
@@ -21,8 +21,8 @@ CREATE TABLE IF NOT EXISTS hr_weekly_schedules (
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
 CREATE TABLE IF NOT EXISTS hr_job_descriptions (
-    id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
-    job_title_id INT UNSIGNED NOT NULL,
+    id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+    job_title_id BIGINT UNSIGNED NOT NULL,
     purpose_ar TEXT NULL,
     responsible_authority VARCHAR(200) NULL,
     relationships VARCHAR(200) NULL,