feat(webhook): skip deployment on [skip ci]/[skip cd] commit markers

Add DetectsSkipDeployCommits trait with two strategies: shouldSkipDeploy
(all commits must contain the marker) for push events, and
shouldSkipDeployAny (any single marker triggers skip) for PR/MR titles
and latest-commit signals.

Apply trait to Bitbucket, Gitea, GitHub, GitLab webhook controllers and
ProcessGithubPullRequestWebhook job. PRs pass pullRequestTitle through
to the job constructor for evaluation.

app/Http/Controllers/Webhook/Bitbucket.php

@@ -4,6 +4,7 @@ namespace App\Http\Controllers\Webhook;
 
 use App\Actions\Application\CleanupPreviewDeployment;
 use App\Http\Controllers\Controller;
+use App\Http\Controllers\Webhook\Concerns\DetectsSkipDeployCommits;
 use App\Models\Application;
 use App\Models\ApplicationPreview;
 use Exception;
@@ -12,6 +13,8 @@ use Visus\Cuid2\Cuid2;
 
 class Bitbucket extends Controller
 {
+    use DetectsSkipDeployCommits;
+
     public function manual(Request $request)
     {
         try {
@@ -31,6 +34,16 @@ class Bitbucket extends Controller
                 $branch = data_get($payload, 'push.changes.0.new.name');
                 $full_name = data_get($payload, 'repository.full_name');
                 $commit = data_get($payload, 'push.changes.0.new.target.hash');
+                // Bitbucket webhooks ship up to 5 commits per change. Larger pushes
+                // are evaluated only on the visible 5.
+                $skip_deploy_commits = self::shouldSkipDeploy(
+                    collect(data_get($payload, 'push.changes', []))
+                        ->flatMap(fn ($change) => data_get($change, 'commits', []))
+                        ->pluck('message')
+                        ->filter()
+                        ->values()
+                        ->all()
+                );
 
                 if (! $branch) {
                     return response([
@@ -45,6 +58,8 @@ class Bitbucket extends Controller
                 $full_name = data_get($payload, 'repository.full_name');
                 $pull_request_id = data_get($payload, 'pullrequest.id');
                 $pull_request_html_url = data_get($payload, 'pullrequest.links.html.href');
+                $pull_request_title = data_get($payload, 'pullrequest.title');
+                $skip_deploy_pr = self::shouldSkipDeployAny([$pull_request_title]);
                 $commit = data_get($payload, 'pullrequest.source.commit.hash');
             }
             $applications = Application::where('git_repository', 'like', "%$full_name%");
@@ -119,6 +134,17 @@ class Bitbucket extends Controller
                 }
                 if ($x_bitbucket_event === 'repo:push') {
                     if ($application->isDeployable()) {
+                        if ($skip_deploy_commits ?? false) {
+                            $return_payloads->push([
+                                'application' => $application->name,
+                                'status' => 'skipped',
+                                'message' => 'All commits contain [skip cd] or [skip ci]. Skipping deployment.',
+                                'application_uuid' => $application->uuid,
+                                'application_name' => $application->name,
+                            ]);
+
+                            continue;
+                        }
                         $deployment_uuid = new Cuid2;
                         $result = queue_application_deployment(
                             application: $application,
@@ -161,6 +187,15 @@ class Bitbucket extends Controller
                 }
                 if ($x_bitbucket_event === 'pullrequest:created' || $x_bitbucket_event === 'pullrequest:updated') {
                     if ($application->isPRDeployable()) {
+                        if ($skip_deploy_pr ?? false) {
+                            $return_payloads->push([
+                                'application' => $application->name,
+                                'status' => 'skipped',
+                                'message' => 'PR title contains [skip cd] or [skip ci]. Skipping preview deployment.',
+                            ]);
+
+                            continue;
+                        }
                         $deployment_uuid = new Cuid2;
                         $found = ApplicationPreview::where('application_id', $application->id)->where('pull_request_id', $pull_request_id)->first();
                         if (! $found) {