enforce 'yamllint' checks

[jameslamb]

Description

Proposes enforcing yamllint checks here. My primary motivation is to catch correctness issues in dependencies.yaml files, like duplicate entries silently resolving to the last one or indentation mistakes leading to filters being ignored.

But this also has some side benefits for consistency, which makes it a bit easier to write automation.

Issue

Contributes to rapidsai/build-planning#305

Checklist

• I am familiar with the Contributing Guidelines.
• Testing
  • New or existing tests cover these changes
• Documentation
  • The documentation is up to date with these changes

[copy-pr-bot]

Auto-sync is disabled for draft pull requests in this repository. Workflows must be run manually.

Contributors can view more details about this message here.

[jameslamb]

/ok to test

[jameslamb]

codecov's docs explicitly say to use off here: https://docs.codecov.com/docs/gitlab-4b-setting-coverage-standards-with-flags

Let's not touch it.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: e452da30-fa2f-4187-b713-8937b2f369b0

📥 Commits

Reviewing files that changed from the base of the PR and between 42d3439 and 46c33bd.

📒 Files selected for processing (1)

• .yamllint.yaml

🚧 Files skipped from review as they are similar to previous changes (1)

• .yamllint.yaml

---

📝 Walkthrough

Walkthrough

Changes

YAML linting rollout

Layer / File(s)	Summary
Define YAML lint policy and exemptions .yamllint.yaml, .pre-commit-config.yaml, codecov.yml, cpp/src/grpc/codegen/field_registry.yaml	Adds yamllint rules and a pre-commit hook, with targeted exclusions and inline suppressions for existing YAML structures.
Route lint configuration changes in CI .github/CODEOWNERS, .github/workflows/pr.yaml	Assigns ownership of .yamllint.yaml and excludes it from unrelated changed-file test groups.
Normalize repository YAML inputs conda/recipes/*/recipe.yaml, dependencies.yaml, docs/cuopt/.../cuopt-nimservice-full.yaml	Updates YAML booleans, indentation, dependency declarations, and Ingress structure while preserving the described package and service contents.

Estimated code review effort: 2 (Simple) | ~10 minutes

Suggested reviewers: gforsyth, rg20, iroy30, bubullzz

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly matches the main change: adding and enforcing yamllint checks.
Description check	✅ Passed	The description is directly related to enforcing yamllint checks and explains the motivation and issue link.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

_{Comment @coderabbitai help to get the list of available commands.}

[github-actions]

CI Test Summary

✅ All 31 test job(s) passed.