Stage 9 — Subcontractor System: outsourced work with cost+markup

Schema:
- subcontractors (specialty, rating, contact)
- subcontract_jobs (work_order link, cost, markup_pct, client_price, status
  workflow, sent_at/eta/returned_at, paid_to_sub)

Models:
- SubcontractJob: auto number (SC-YY-NNNN), client_price = cost×(1+markup/100)
  when markup>0 (else manual), margin() helper, recalcs parent WO on save/delete
- WorkOrder.recalcTotal now includes non-cancelled subcontract job client_price

Filament (new "Subcontractare" nav group):
- SubcontractorResource (specialty/rating CRUD)
- SubcontractJobResource board with cost/client/margin columns + status filters,
  nav badge = open jobs
- SubcontractJobsRelationManager on WorkOrder

Tests (7 new):
- client_price from markup; manual price without markup; auto number;
  WO total includes jobs; cancelled excluded; delete recalcs; tenant isolation

Closes roadmap to 16/18 stages (only Stage 10 Bodyshop remains).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/Models/Tenant/Subcontractor.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Models\Tenant;
+
+use App\Models\Concerns\BelongsToTenant;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class Subcontractor extends Model
+{
+    use BelongsToTenant, SoftDeletes;
+
+    public const SPECIALTIES = [
+        'Turbo', 'Cutie viteze', 'Variator', 'Casetă direcție',
+        'PDR', 'Vopsitorie', 'Electronică', 'Injectoare', 'Altele',
+    ];
+
+    protected $fillable = [
+        'company_id', 'name', 'specialty', 'phone', 'email',
+        'rating', 'is_active', 'notes',
+    ];
+
+    protected $casts = [
+        'is_active' => 'boolean',
+    ];
+
+    public function jobs(): HasMany
+    {
+        return $this->hasMany(SubcontractJob::class);
+    }
+}