feat(postgres): add internal database upgrade script

Publish upgrade-postgres.sh with install and upgrade flows, include the
PostgreSQL compose override when present, and sync the script to BunnyCDN.

tests/Feature/SyncBunnyTest.php

@@ -46,3 +46,22 @@ it('syncs nightly versions to BunnyCDN without creating a GitHub PR', function (
     Http::assertSent(fn ($request) => str_starts_with($request->url(), 'https://api.bunny.net/purge')
         && $request['url'] === 'https://cdn.coollabs.io/coolify-nightly/versions.json');
 });
+
+it('syncs postgres upgrade script to BunnyCDN during full sync', function () {
+    Http::fake([
+        'https://cdn.coollabs.io/coolify/*' => Http::response('', 404),
+        'https://storage.bunnycdn.com/*' => Http::response([], 201),
+        'https://api.bunny.net/purge*' => Http::response([], 200),
+    ]);
+
+    $this->artisan('sync:bunny')
+        ->expectsConfirmation('Are you sure you want to sync?', 'yes')
+        ->expectsOutputToContain('BunnyCDN sync: Complete')
+        ->assertExitCode(0);
+
+    Http::assertSent(fn ($request) => $request->method() === 'PUT'
+        && $request->url() === 'https://storage.bunnycdn.com/coolcdn/coolify/upgrade-postgres.sh');
+
+    Http::assertSent(fn ($request) => str_starts_with($request->url(), 'https://api.bunny.net/purge')
+        && $request['url'] === 'https://cdn.coollabs.io/coolify/upgrade-postgres.sh');
+});