feat: web, webhook and telegram channel drivers

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

core/app/Channels/DeliveryOutcome.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Channels;
+
+final class DeliveryOutcome
+{
+    private function __construct(
+        public readonly bool $ok,
+        public readonly ?string $error,
+        /** @var array<string,mixed> служебное канала, ляжет в deliveries.meta */
+        public readonly array $meta,
+    ) {}
+
+    public static function ok(array $meta = []): self
+    {
+        return new self(true, null, $meta);
+    }
+
+    public static function failed(string $error): self
+    {
+        return new self(false, $error, []);
+    }
+}