Run a queue worker under Sail

MarkBookingPaid/MarkBookingRefunded (and anything else ShouldQueue) had
nothing consuming the jobs table locally — no queue service existed in
compose.yaml, so a booking's status only flipped once someone happened to
run `sail artisan queue:work` by hand. Refund actions in Filament looked
like they hadn't taken effect until that ran.

compose.yaml

@@ -24,6 +24,27 @@ services:
         depends_on:
             - pgsql
             - redis
+    laravel.queue:
+        build:
+            context: './vendor/laravel/sail/runtimes/8.5'
+            dockerfile: Dockerfile
+            args:
+                WWWGROUP: '${WWWGROUP}'
+        image: 'sail-8.5/app'
+        # Nothing was processing MarkBookingPaid/MarkBookingRefunded — a
+        # confirmed/cancelled booking's status only ever flipped once
+        # someone happened to run `sail artisan queue:work` by hand.
+        command: php artisan queue:work --tries=3 --sleep=1
+        environment:
+            WWWUSER: '${WWWUSER}'
+            LARAVEL_SAIL: 1
+        volumes:
+            - '.:/var/www/html'
+        networks:
+            - sail
+        depends_on:
+            - pgsql
+            - redis
     pgsql:
         image: 'postgres:18-alpine'
         ports: