ci: Pass PR author to client regeneration and fix cleanup conditions (#2406)

## Summary

- Pass docs PR author to apify-client-python workflow for assignee resolution
- Only close the client model PR when the docs PR is closed without merging

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: vdusek

.github/workflows/openapi-ci.yaml

@@ -148,20 +148,24 @@ jobs:
               env:
                   GITHUB_TOKEN: ${{ secrets.APIFY_SERVICE_ACCOUNT_GITHUB_TOKEN }}
                   PR_NUMBER: ${{ github.event.pull_request.number }}
+                  PR_AUTHOR: ${{ github.event.pull_request.user.login }}
               run: |
                   gh workflow run manual_regenerate_models.yaml \
                       --repo apify/apify-client-python \
                       --field docs_pr_number="$PR_NUMBER" \
-                      --field docs_workflow_run_id="${{ github.run_id }}"
+                      --field docs_workflow_run_id="${{ github.run_id }}" \
+                      --field docs_pr_author="$PR_AUTHOR"
 
-    # When a docs PR is closed (merged or abandoned), clean up the corresponding auto-generated PR
+    # When a docs PR is closed without being merged, clean up the corresponding auto-generated PR
     # in apify-client-python to avoid stale PRs piling up.
+    # If the docs PR is merged, the client PR is left open for manual review and merge.
     cleanup-client-model-pr:
         name: Close Python client model PR on docs PR close
         runs-on: ubuntu-latest
         if: >-
             github.event_name == 'pull_request'
             && github.event.action == 'closed'
+            && github.event.pull_request.merged == false
             && github.event.pull_request.head.repo.full_name == github.repository
 
         steps:
@@ -182,7 +186,7 @@ jobs:
                     gh pr close "$EXISTING_PR" \
                         --repo apify/apify-client-python \
                         --delete-branch \
-                        --comment "Closing this PR because the source apify-docs PR #${PR_NUMBER} was closed."
+                        --comment "Closing this PR because the source apify-docs PR #${PR_NUMBER} was closed without merging."
                     echo "Closed apify-client-python PR #$EXISTING_PR"
                   else
                     echo "No corresponding apify-client-python PR found for branch $BRANCH"