Summary by cubic

Run CI only on pull_request events when a PR is opened, synchronized, or reopened, so PR updates always build. Removed the push trigger and branch filters (no sponsors exclusion).

• Description

  • Trigger on pull_request types: opened, synchronize, reopened.
  • Removed push event trigger.
  • Removed branch filters, including "!sponsors".
  • Context: .github/workflows/run-ci.yml only.

• Testing

  • No tests added or modified.
  • Validate by opening or updating a PR; CI should run on open, synchronize, or reopen. Direct pushes without a PR will not run.

^{Written for commit 04205d4. Summary will update on new commits.}