Implement Keystone environment deployments

app/Models/BuildArtifact.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace App\Models;
+
+use App\Enums\BuildArtifactStatus;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class BuildArtifact extends Model
+{
+    protected $guarded = [];
+
+    protected function casts(): array
+    {
+        return [
+            'status' => BuildArtifactStatus::class,
+            'metadata' => 'array',
+        ];
+    }
+
+    public function environment(): BelongsTo
+    {
+        return $this->belongsTo(Environment::class);
+    }
+
+    public function builtByOperation(): BelongsTo
+    {
+        return $this->belongsTo(Operation::class, 'built_by_operation_id');
+    }
+
+    public function builtByService(): BelongsTo
+    {
+        return $this->belongsTo(Service::class, 'built_by_service_id');
+    }
+}