Improves the artifact comment workflow to provide better visibility into ongoing builds by:
- Triggering comments when builds start (requested event) instead of only on completion
- Using commit SHA for concurrency grouping to better handle multiple builds for the same commit
- Collecting artifacts from all recent build workflows for a PR rather than just the current run
- Adding a build status table showing progress of Android and iOS workflows
- Displaying progressive status updates even when builds are still in progress
- Enabling cancel-in-progress to prevent redundant workflow runs
This provides users with immediate feedback on build progress and comprehensive artifact availability across all platforms.
