chore: upgrade Laravel 12 to 13 (#242)
## Summary
- Upgrade `laravel/framework` from v12 to **v13.1.1** and update all 52
dependencies to their latest versions
- Bump `laravel/tinker` from v2 to **v3.0** (required for Laravel 13
compatibility)
- Address Laravel 13 breaking change: add `serializable_classes =>
false` to `config/cache.php`
- Fix cached `Collection` in `routes/web.php` — converted to plain array
via `->toArray()` for serialization safety
## Changes
| File | What changed |
|------|-------------|
| `composer.json` | Bumped `php ^8.3`, `laravel/framework ^13.0`,
`laravel/tinker ^3.0` |
| `composer.lock` | 52 packages updated, 1 removed
(`symfony/polyfill-php83`) |
| `config/cache.php` | Added `serializable_classes => false` |
| `routes/web.php` | Cached query result uses `->toArray()`, fallback
changed from `collect()` to `[]` |
## Testing
Full test suite passing: **919 tests, 3792 assertions, 0 failures**
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