fix(ci): fix autoloading and bootstrap cache issues causing test failures

Three changes:
1. Add composer dump-autoload after composer install in all jobs
   (validate, test, security) — ensures fresh autoloader mapping
2. Replace config:clear + view:clear with optimize:clear in test job
   — clears bootstrap/cache (services.php, packages.php) which
   caused 'Class not found' for Sanctum\Guard, 'not instantiable'
   for AttendanceMailerService, and 'factory() undefined' for User
3. Add explicit $incrementing = true to Configuration model
   — ensures Eloquent treats id as auto-increment (belt-and-suspenders
   for SQLite NOT NULL constraint failures)

.gitea/workflows/build.yml

@@ -74,7 +74,9 @@ jobs:
             ${{ runner.os }}-composer-
 
       - name: Install PHP dependencies
-        run: composer install --prefer-dist --no-interaction --no-progress
+        run: |
+          composer install --prefer-dist --no-interaction --no-progress
+          composer dump-autoload
 
       - name: Composer validate
         run: composer validate
@@ -128,7 +130,9 @@ jobs:
             ${{ runner.os }}-composer-
 
       - name: Install PHP dependencies
-        run: composer install --prefer-dist --no-interaction --no-progress
+        run: |
+          composer install --prefer-dist --no-interaction --no-progress
+          composer dump-autoload
 
       - name: Bootstrap Laravel testing environment
         run: |
@@ -154,8 +158,7 @@ jobs:
           touch database/database.sqlite
           php artisan key:generate --force
           php artisan jwt:secret --force || true
-          php artisan config:clear
-          php artisan view:clear
+          php artisan optimize:clear
 
       - name: Run database migrations
         run: php artisan migrate:fresh --force
@@ -250,7 +253,9 @@ jobs:
           rm composer-setup.php
 
       - name: Install PHP dependencies
-        run: composer install --prefer-dist --no-interaction --no-progress
+        run: |
+          composer install --prefer-dist --no-interaction --no-progress
+          composer dump-autoload
 
       - name: Composer audit
         run: composer audit --locked --no-interaction --format=json || echo "Audit found advisories (non-blocking)"