Limit workflow triggers to relevant path changes

[brendandburns]

Summary

Add path filters to commit-triggered GitHub Actions workflows so they run only when relevant files are modified.

Changes

• Add paths filters to push and pull_request in .github/workflows/codeql-analysis.yml
• Add paths filters to pull_request in .github/workflows/buildtest.yaml
• Add paths filters to push in .github/workflows/docfx.yaml
• Add paths filters to push in .github/workflows/draft.yaml

Notes

• schedule in CodeQL and workflow_dispatch in Docfx are unchanged.
• .github/workflows/nuget.yaml is release-triggered and intentionally unchanged.

Why

This reduces unnecessary CI load and shortens feedback time by skipping workflow runs for unrelated changes.

[Copilot]

Pull request overview

This PR adds paths filters to multiple GitHub Actions workflows so they only trigger on changes that are likely to affect their outputs, reducing unnecessary CI runs.

Changes:

• Add paths filters to push/pull_request triggers for CodeQL analysis.
• Add paths filters to PR-triggered build/test workflow.
• Add paths filters to Docfx and Draft Release workflows on push.

Show a summary per file

File	Description
.github/workflows/draft.yaml	Restricts draft release workflow runs to source/test/build-relevant changes.
.github/workflows/docfx.yaml	Restricts Docfx workflow runs to documentation/source/readme changes.
.github/workflows/codeql-analysis.yml	Restricts CodeQL runs to code/build configuration changes (plus workflow self-changes).
.github/workflows/buildtest.yaml	Restricts PR build/test runs to code/e2e/build configuration changes (plus workflow self-changes).

Review details

Tip

Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

Comments suppressed due to low confidence (1)

.github/workflows/codeql-analysis.yml:35

• The new pull_request.paths filter also omits .editorconfig. If a PR only changes analyzer/style config, CodeQL would be skipped; include .editorconfig to ensure scanning reflects updated analysis settings.

      - 'Directory.*'
      - 'global.json'
      - 'nuget.config'

• Files reviewed: 4/4 changed files
• Comments generated: 4
• Review effort level: Low

[tg123]

/LGTM

editorconfig is nice to add the list

[kubernetes-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: brendandburns, tg123

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Details

Needs approval from an approver in each of these files:

• OWNERS [brendandburns,tg123]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[kubernetes-prow]

PR needs rebase.

Details

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.