Replace all uses of `forceFill`, `forceCreate`, and `forceFill` with their
non-force equivalents across models, actions, controllers, and Livewire
components. Add explicit `$fillable` arrays to all affected Eloquent models
to enforce mass assignment protection.
Add ModelFillableCreationTest and ModelFillableRegressionTest to verify that
model creation respects fillable constraints and prevent regressions.
Replace $guarded usage with explicit $fillable arrays across all models.
Sync fillable definitions with current database schema and add tests.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
