chore(v5): archive V5 implementation and remove runtime integration

Move V5 source, migrations, UI, scripts, and tests into documentation, then remove V5 routes, models, jobs, configuration, dependencies, and application hooks.

docs/v5/archive/app/Support/V5/ResourceConnectionSerializer.php.txt

@@ -0,0 +1,73 @@
+<?php
+
+namespace App\Support\V5;
+
+use App\Models\V5\Application as V5Application;
+use App\Models\V5\ResourceConnection;
+use Illuminate\Support\Collection;
+
+/**
+ * Single source of truth for the resource connection payloads served by the
+ * dashboard Inertia props and the connection endpoints — the wire format is
+ * consumed by resources/js/v5/types.ts and must stay stable.
+ */
+class ResourceConnectionSerializer
+{
+    /**
+     * @return array<string, mixed>
+     */
+    public function serialize(ResourceConnection $connection): array
+    {
+        $applications = $this->applicationsById($connection);
+        $resourceOneUuid = $applications->get($connection->resource_one_id)?->uuid;
+        $resourceTwoUuid = $applications->get($connection->resource_two_id)?->uuid;
+        $applicationsById = $applications;
+
+        return [
+            'id' => $connection->uuid,
+            'applicationIds' => array_values(array_filter([
+                $resourceOneUuid,
+                $resourceTwoUuid,
+            ])),
+            'fromApplicationId' => $resourceOneUuid,
+            'toApplicationId' => $resourceTwoUuid,
+            'portsByDirection' => $connection->rules
+                ->groupBy(function ($rule) use ($applicationsById): string {
+                    $sourceUuid = $applicationsById->get($rule->source_resource_id)?->uuid;
+                    $targetUuid = $applicationsById->get($rule->target_resource_id)?->uuid;
+
+                    return "{$sourceUuid}->{$targetUuid}";
+                })
+                ->filter(fn (Collection $rules, string $direction): bool => ! str_starts_with($direction, '->') && ! str_ends_with($direction, '->'))
+                ->map(fn (Collection $rules) => $rules
+                    ->sortBy('port')
+                    ->pluck('port')
+                    ->map(fn ($port) => (string) $port)
+                    ->values()
+                    ->all())
+                ->all(),
+        ];
+    }
+
+    /**
+     * @return Collection<string, V5Application>
+     */
+    public function applicationsByUuid(ResourceConnection $connection): Collection
+    {
+        return $this->applicationsById($connection)->keyBy('uuid');
+    }
+
+    /**
+     * @return Collection<int, V5Application>
+     */
+    public function applicationsById(ResourceConnection $connection): Collection
+    {
+        return V5Application::query()
+            ->whereIn('id', [
+                (int) $connection->resource_one_id,
+                (int) $connection->resource_two_id,
+            ])
+            ->get()
+            ->keyBy('id');
+    }
+}