fix(ci): stop pull_request and pull_request_target PR Automation runs cancelling each other

[jdfalk]

Problem

pr-automation.yml triggers on both pull_request and pull_request_target, and both runs land in one concurrency group (PR Automation-<number>, cancel-in-progress: true). Every PR event starts both runs at the same instant; whichever is queued second cancels the other. The cancelled run's jobs show as red checks.

Evidence:

• fix(ci): skip dead Go coverage rerun without .testcoverage.yml; go-ci cap 40m #365 run 37265215047 (pull_request): Code Quality Check, Auto Label PR, Intelligent AI Labeling, PR Analysis, Breaking Changes Check, AI Rebase & Conflict Resolution all CANCELLED at 0s with annotation Canceling since a higher priority waiting request for PR Automation-365 exists. Run 37265215038 (pull_request_target) for the same push ran.
• deps(deps): Bump the "dependencies" group with 2 updates across multiple ecosystems #363 (run 35739341638) and deps(deps): Bump the "dependencies" group with 3 updates across multiple ecosystems #364 (run 36581594665): the pull_request_target side lost the race instead; Code Quality Check and Intelligent AI Labeling show CANCELLED.

So this breaks every PR in the repo, independent of what the PR changes.

Fix

Add github.event_name to the group. Same-event supersession (a newer synchronize replacing an older one) still cancels, which is intended; the two triggers no longer cancel each other. cancel-in-progress: false would not fix it, since a newer pending run still replaces an older pending one.

This PR proves itself: its pull_request run uses the new group from the merge ref, its pull_request_target run uses main's old group, so they no longer collide.

Noted, not fixed here

The pull_request_target run's Code Quality Check does a plain actions/checkout with no ref, so on that event it checks out the base branch and lints main, not the PR. Its "pass" says nothing about the PR. Out of scope for this fix.

🤖 Generated with Claude Code

https://claude.ai/code/session_017MtQ5LP2n3t3bs7AhptkKJ