Skip Mail calendar sync for Meet rooms created by Ladill Events.

Events owns calendar entries for events-sourced rooms so virtual sessions
do not duplicate on the webmail calendar.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/Feature/MeetWebTest.php

@@ -769,6 +769,33 @@ class MeetWebTest extends TestCase
         });
     }
 
+    public function test_events_sourced_room_does_not_sync_to_mail_calendar(): void
+    {
+        \Illuminate\Support\Facades\Http::fake([
+            'mail.ladill.com/*' => \Illuminate\Support\Facades\Http::response(['data' => ['id' => 99]], 201),
+        ]);
+
+        config([
+            'meet.calendar.mail.api_url' => 'https://mail.ladill.com/api/service/v1',
+            'meet.calendar.mail.api_key' => 'mail-test-key',
+        ]);
+
+        $room = $this->createRoom([
+            'scheduled_at' => now()->addDay(),
+            'source' => [
+                'app' => 'events',
+                'entity_type' => 'virtual_session',
+                'entity_id' => 'vs-1',
+                'event_id' => '42',
+            ],
+        ]);
+
+        app(\App\Services\Meet\CalendarService::class)->syncRoomCreated($room, $this->user);
+
+        \Illuminate\Support\Facades\Http::assertNothingSent();
+        $this->assertNull($room->fresh()->calendar_event_id);
+    }
+
     public function test_host_can_create_conference(): void
     {
         $this->actingAs($this->user)