Add external import sources, work history, screening fields and Phase 1 docs

- New ExternalImportSource and ExternalWorkHistoryEntry models, controller and migrations
- Screening fields on external profile imports
- Admin and provider profile views, routes and workflow tests updated
- Phase 1 validation, route inventory, gap report template and roadmap docs
- Add the Google Sheets work-order parser tool (tools/google-sheets-wo-parser)

app/Models/ExternalWorkHistoryEntry.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Attributes\Fillable;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+#[Fillable([
+    'provider_profile_id', 'external_profile_import_id', 'external_import_source_id',
+    'platform', 'external_work_order_id', 'service_title', 'performed_on',
+    'customer_name', 'work_type', 'location', 'rating', 'status', 'source_url',
+    'visibility', 'raw_payload',
+])]
+class ExternalWorkHistoryEntry extends Model
+{
+    protected function casts(): array
+    {
+        return [
+            'performed_on' => 'date',
+            'rating' => 'decimal:2',
+            'raw_payload' => 'array',
+        ];
+    }
+
+    public function providerProfile(): BelongsTo
+    {
+        return $this->belongsTo(ProviderProfile::class);
+    }
+
+    public function externalProfileImport(): BelongsTo
+    {
+        return $this->belongsTo(ExternalProfileImport::class);
+    }
+
+    public function externalImportSource(): BelongsTo
+    {
+        return $this->belongsTo(ExternalImportSource::class);
+    }
+}