labrodev-modellisted

# Models, Collections, and Observers Part of the Labrodev playbook. **The law for this component lives in the always-on `labrodev-model` guideline** (musts, must-nots); the per-file checklists are `rules/models.md` and `rules/migrations.md`. This skill holds the craft: anatomy, canonical templates, and edge cases. This skill covers five templates in order: the shared `BaseModel` every model extends, the model itself, its Collection, its Observer, and the migration that backs it. **Every model ships with its full trio — Policy (→ labrodev-authorization skill), Observer, and Collection — always**; none of the three is optional or deferred. ## BaseModel (shared, one per project) Location: `Core/Shared/Models/BaseModel.php`. All domain models extend it. Responsibilities: blocks mass assignment for every model (`$guarded = ['*']`), centralizes hidden fields, enables `Model::factory()` for models declaring `#[UseFactory]`. Business logic never lives here; concrete models use `$visible` instead of overriding `$hidden`. ```php <?php declare(strict_types=1); namespace Core\Shared\Models; use Illuminate\Database\Eloquent\Factories\HasFactory; use Illuminate\Database\Eloquent\Model; abstract class BaseModel extends Model { /** @use HasFactory<\Illuminate\Database\Eloquent\Factories\Factory> */ use HasFactory; protected $guarded = ['*']; protected $hidden = [ 'created_by', 'updated_by', 'deleted_at', 'created_at', 'updat