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.

tests/Unit/DetectsSkipDeployCommitsTest.php

@@ -0,0 +1,115 @@
+<?php
+
+use App\Http\Controllers\Webhook\Concerns\DetectsSkipDeployCommits;
+
+$harness = new class
+{
+    use DetectsSkipDeployCommits;
+};
+
+$harnessClass = get_class($harness);
+
+describe('shouldSkipDeploy (all-must-match)', function () use ($harnessClass) {
+    test('returns false when messages array is empty', function () use ($harnessClass) {
+        expect($harnessClass::shouldSkipDeploy([]))->toBeFalse();
+    });
+
+    test('returns false when only nulls or empty strings are provided', function () use ($harnessClass) {
+        expect($harnessClass::shouldSkipDeploy([null, '', null]))->toBeFalse();
+    });
+
+    test('returns true when all messages contain [skip ci]', function () use ($harnessClass) {
+        $messages = [
+            'Update docs [skip ci]',
+            'Fix typo [skip ci]',
+        ];
+        expect($harnessClass::shouldSkipDeploy($messages))->toBeTrue();
+    });
+
+    test('returns true when single message contains [skip cd]', function () use ($harnessClass) {
+        expect($harnessClass::shouldSkipDeploy(['Update README [skip cd]']))->toBeTrue();
+    });
+
+    test('returns true with mixed [skip ci] and [skip cd] (case-insensitive)', function () use ($harnessClass) {
+        $messages = [
+            'Docs [SKIP CI]',
+            'Changelog [Skip Cd]',
+        ];
+        expect($harnessClass::shouldSkipDeploy($messages))->toBeTrue();
+    });
+
+    test('returns false when at least one message has no skip marker', function () use ($harnessClass) {
+        $messages = [
+            'Update docs [skip ci]',
+            'Actual feature change',
+        ];
+        expect($harnessClass::shouldSkipDeploy($messages))->toBeFalse();
+    });
+
+    test('returns false when single message has no skip marker', function () use ($harnessClass) {
+        expect($harnessClass::shouldSkipDeploy(['Deploy this please']))->toBeFalse();
+    });
+
+    test('null entries are filtered before evaluation', function () use ($harnessClass) {
+        $messages = [
+            null,
+            'Docs [skip ci]',
+            null,
+        ];
+        expect($harnessClass::shouldSkipDeploy($messages))->toBeTrue();
+    });
+
+    test('matches PR title scenario (single string)', function () use ($harnessClass) {
+        expect($harnessClass::shouldSkipDeploy(['chore: update readme [skip ci]']))->toBeTrue();
+        expect($harnessClass::shouldSkipDeploy(['feat: real change']))->toBeFalse();
+        expect($harnessClass::shouldSkipDeploy([null]))->toBeFalse();
+    });
+});
+
+describe('shouldSkipDeployAny (any-marker)', function () use ($harnessClass) {
+    test('returns false when messages array is empty', function () use ($harnessClass) {
+        expect($harnessClass::shouldSkipDeployAny([]))->toBeFalse();
+    });
+
+    test('returns false when only nulls or empty strings are provided', function () use ($harnessClass) {
+        expect($harnessClass::shouldSkipDeployAny([null, '', null]))->toBeFalse();
+    });
+
+    test('returns true when any one message contains [skip ci]', function () use ($harnessClass) {
+        $messages = [
+            'Real feature change',
+            'docs: update readme [skip ci]',
+        ];
+        expect($harnessClass::shouldSkipDeployAny($messages))->toBeTrue();
+    });
+
+    test('returns true when any one message contains [skip cd]', function () use ($harnessClass) {
+        expect($harnessClass::shouldSkipDeployAny(['feature change', 'chore [skip cd]']))->toBeTrue();
+    });
+
+    test('returns true case-insensitively', function () use ($harnessClass) {
+        expect($harnessClass::shouldSkipDeployAny(['feat: docs [SKIP CI]']))->toBeTrue();
+        expect($harnessClass::shouldSkipDeployAny(['feat: docs [Skip Cd]']))->toBeTrue();
+    });
+
+    test('returns false when no message contains a skip marker', function () use ($harnessClass) {
+        $messages = [
+            'feat: add new endpoint',
+            'fix: handle edge case',
+        ];
+        expect($harnessClass::shouldSkipDeployAny($messages))->toBeFalse();
+    });
+
+    test('null and empty entries are skipped, real markers still match', function () use ($harnessClass) {
+        expect($harnessClass::shouldSkipDeployAny([null, '', 'docs [skip ci]', null]))->toBeTrue();
+        expect($harnessClass::shouldSkipDeployAny([null, '', null]))->toBeFalse();
+    });
+
+    test('PR title alone with skip marker triggers skip', function () use ($harnessClass) {
+        expect($harnessClass::shouldSkipDeployAny(['chore: update readme [skip ci]']))->toBeTrue();
+    });
+
+    test('PR title without skip marker but commit message with skip marker triggers skip', function () use ($harnessClass) {
+        expect($harnessClass::shouldSkipDeployAny(['feat: real change', 'wip [skip cd]']))->toBeTrue();
+    });
+});