[mberman84]

Summary

• dispatch each configured active CI workflow once after the GitHub worker merges a batch
• make the composite action enable that behavior by default
• pause the pipeline if post-merge CI dispatch fails
• document and test the required workflow_dispatch and actions: write contract
• pin v0.2.2 to implementation commit 2a502a74251e2fbb07e5b4769ce99687235df5ae

This closes GitHub's built-in-token event gap: merges made by github.token do not produce ordinary push workflow runs, but explicit workflow dispatch is allowed.

Verification

• 81 tests + 11 subtests
• Ruff
• wheel and sdist build