Load custom repository properties on GHES and remove feature flag

[henrymercer]

• Clean up the repository properties feature flag now that this has been fully enabled for a while.
• Start loading repository properties on GHES, since this API is available on all supported GHES versions (since 3.13)

Risk assessment

For internal use only. Please select the risk level of this change:

• Low risk: Changes are fully under feature flags, or have been fully tested and validated in pre-production environments and are highly observable, or are documentation or test only.

Which use cases does this change impact?

Workflow types:

• Advanced setup - Impacts users who have custom CodeQL workflows.
• Managed - Impacts users with dynamic workflows (Default Setup, Code Quality, ...).

Products:

• Code Scanning - The changes impact analyses when analysis-kinds: code-scanning.
• Code Quality - The changes impact analyses when analysis-kinds: code-quality.
• Other first-party - The changes impact other first-party analyses.
• Third-party analyses - The changes affect the upload-sarif action.

Environments:

• Dotcom - Impacts CodeQL workflows on github.com and/or GitHub Enterprise Cloud with Data Residency.
• GHES - Impacts CodeQL workflows on GitHub Enterprise Server.

How did/will you validate this change?

• None - I am not validating these changes.

If something goes wrong after this change is released, what are the mitigation and rollback strategies?

• Rollback - Change can only be disabled by rolling back the release or releasing a new version with a fix.

How will you know if something goes wrong after this change is released?

• Telemetry - I rely on existing telemetry or have made changes to the telemetry.
  • Alerts - New or existing monitors will trip if something goes wrong with this change.

Are there any special considerations for merging or releasing this change?

• No special considerations - This change can be merged at any time.

Merge / deployment checklist

• Confirm this change is backwards compatible with existing workflows.
• Consider adding a changelog entry for this change.
• Confirm the readme and docs have been updated if necessary.

[Copilot]

Pull request overview

This PR removes the now-unneeded repository properties feature flag and enables loading custom repository properties on GHES, so server-side configuration (e.g. github-codeql-disable-overlay) works consistently across GitHub.com and GHES.

Changes:

• Remove the UseRepositoryProperties feature flag and its gating logic.
• Enable repository properties loading on GHES by removing the GHES short-circuit.
• Update unit tests and changelog entry accordingly (and regenerate lib/ outputs).

Reviewed changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/init-action.ts	Removes feature-flag gating for repository properties loading.
src/feature-flags/properties.ts	Removes the GHES “always return {}” behavior so the API is called on GHES too.
src/feature-flags/properties.test.ts	Updates tests to match the new loadPropertiesFromApi signature and behavior.
src/feature-flags.ts	Removes the UseRepositoryProperties feature flag from the enum and config.
CHANGELOG.md	Adds an UNRELEASED entry describing repository properties now loading on GHES.
lib/upload-sarif-action.js	Generated output updated for removed feature flag.
lib/upload-sarif-action-post.js	Generated output updated for removed feature flag.
lib/upload-lib.js	Generated output updated for removed feature flag.
lib/start-proxy-action.js	Generated output updated for removed feature flag.
lib/start-proxy-action-post.js	Generated output updated for removed feature flag.
lib/setup-codeql-action.js	Generated output updated for removed feature flag.
lib/resolve-environment-action.js	Generated output updated for removed feature flag.
lib/init-action.js	Generated output updated for removed feature flag and repo properties changes.
lib/init-action-post.js	Generated output updated for removed feature flag.
lib/autobuild-action.js	Generated output updated for removed feature flag.
lib/analyze-action.js	Generated output updated for removed feature flag.
lib/analyze-action-post.js	Generated output updated for removed feature flag.