Support linking PRs with tickets through comments [MDB-24383]

.github/workflows/link_startrek.yml

@@ -3,22 +3,27 @@ name: Link with Startrek
 on:
   pull_request: { branches: [main] }
 
+env:
+  ISSUE_PATTERN: '[A-Z]+-[0-9]+'
+
 jobs:
-  link_with_startrek:    
-    continue-on-error: true
+  link:
     runs-on: ubuntu-latest
     steps:
-      - name: parse_branch_name
-        id: parse_branch_name
+      - uses: actions/checkout@v3
+      - name: parse_issue
+        id: parse_issue
         run: |
-          if [[ ${{ github.head_ref }} =~ ^([A-Za-z]+\-[0-9]+).*$ ]]; then
+          HEAD_COMMIT_MESSAGE="$(git show -s --format=%s HEAD)"
+          echo $HEAD_COMMIT_MESSAGE
+          if [[ "$HEAD_COMMIT_MESSAGE" =~ \[($ISSUE_PATTERN)\] || "${{ github.head_ref }}" =~ ^($ISSUE_PATTERN) ]]; then
               echo issue_number="${BASH_REMATCH[1]}" >> $GITHUB_OUTPUT          
           fi
       - name: link_issue
-        if: steps.parse_branch_name.outputs.issue_number
+        if: steps.parse_issue.outputs.issue_number
         uses: fjogeleit/http-request-action@v1
         with:
-          url: 'https://st-api.yandex-team.ru/v2/issues/${{ steps.parse_branch_name.outputs.issue_number }}'
+          url: 'https://st-api.yandex-team.ru/v2/issues/${{ steps.parse_issue.outputs.issue_number }}'
           method: 'LINK'
           customHeaders: >
             {