Feat/models security validation optimization

[imhayatunnabi]

This PR fixes three critical issues affecting production stability and Laravel 12 compatibility, plus adds security enhancements and performance optimizations.

Issues Fixed

1. Race Condition in Permission Loading
2. Laravel 12 Automatic Eager Loading Bug
3. Input Validation and Query Optimization

Reduced unnecessary container resolution calls:

Before:

public function roles(): BelongsToMany
{
    return $this->belongsToMany(
        config('permission.models.role'),
        config('permission.table_names.role_has_permissions'),
        app(PermissionRegistrar::class)->pivotPermission,  // Call 1
        app(PermissionRegistrar::class)->pivotRole         // Call 2
    );
}

After:

public function roles(): BelongsToMany
{
    $registrar = app(PermissionRegistrar::class);  // Single call

    return $this->belongsToMany(
        config('permission.models.role'),
        config('permission.table_names.role_has_permissions'),
        $registrar->pivotPermission,
        $registrar->pivotRole
    );
}

[parallels999]

Shouldn't these validations go to the traits?
https://github.com/spatie/laravel-permission/blob/main/src/Traits/HasPermissions.php

[imhayatunnabi]

@parallels999
now in one place and follow DRY
d5583f8

[drbyte]

Please remove all these validation methods from all files in this PR.

[drbyte]

The suggested validations can be done in application code.