Include telemetry tags so we can track usage of the action

[derekmisler]

Closes https://github.com/docker/gordon/issues/121

Summary

Adds telemetry tags to the GitHub Action to enable tracking of action usage across repositories and workflows. The tags include source identifier, repository name, workflow name, and run ID.

Changes

• action.yml: Added TELEMETRY_TAGS environment variable with GitHub context values (repository, workflow, run_id) to track action usage

Breaking Changes

None

How to Test

• Run the action in any workflow and verify the telemetry tags are properly passed through
• Check that the tags contain the expected GitHub context values: repository name, workflow name, and run ID

[derekmisler]

/describe

[docker-agent]

✅ PR description has been generated and updated!

[docker-agent]

Code Review Summary

✅ No issues found - The added telemetry tags are properly formatted and safe.

Review Details

I reviewed the addition of TELEMETRY_TAGS environment variable on line 429. The implementation correctly uses GitHub context variables (github.repository, github.workflow, github.run_id) in a comma-separated key=value format.

Security Analysis: GitHub enforces strict constraints on these context variables:

• github.repository: Only alphanumeric characters, hyphens, and underscores
• github.workflow: Can contain spaces, hyphens, underscores (no commas or equals signs)
• github.run_id: Always numeric

These constraints prevent any injection attacks or format-breaking characters, making the implementation safe as-is.

Recommendation: Approved - the code is correct and secure for its intended purpose.