feat: tick planner, delivery job, scheduler and purge

Also: test uses disabled channels instead of deleting them (FK cascade); ChannelRegistry no longer final so tests can extend it (controller ruling).

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BCrwHHnGCB5XH968Nxokqw

core/app/Console/Commands/PurgeCommand.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Console\Commands;
+
+use App\Enums\EventState;
+use App\Models\Event;
+use Carbon\CarbonImmutable;
+use Illuminate\Console\Command;
+
+class PurgeCommand extends Command
+{
+    protected $signature = 'hado:purge';
+
+    protected $description = 'Удаляет терминальные события старше HADO_RETENTION_DAYS';
+
+    public function handle(): int
+    {
+        $terminal = array_map(fn (EventState $s) => $s->value, array_filter(EventState::cases(), fn (EventState $s) => $s->isTerminal()));
+        $cutoff = CarbonImmutable::now()->subDays((int) config('hado.retention_days'));
+
+        $deleted = Event::whereIn('state', $terminal)->where('updated_at', '<', $cutoff)->delete();
+        $this->info("Удалено событий: {$deleted}");
+
+        return self::SUCCESS;
+    }
+}