chore(runtime): release ingress-nginx 4.15.0

[plural-copilot]

Summary

• Release runtime chart 0.1.37 with ingress-nginx chart 4.15.0 (controller 1.15.0).
• Move both ingress-nginx dependencies together: the public dependency and the ingress-nginx-private alias now resolve to 4.15.0.
• Regenerate Chart.lock and replace the vendored 4.14.1 archive with the checksum-verified upstream 4.15.0 archive.

Rationale

This must be released before plrl-up-demos pins management runtime 0.1.37 for the EKS 1.35 upgrade, which is blocked on the management ingress update.

Validation

• Helm 3.17.3: dependency build, lint, and template render passed.
• Verified the vendored archive exactly matches an upstream 4.15.0 pull and reports controller 1.15.0.
• Confirmed the diff is limited to the runtime chart metadata, lockfile, and ingress-nginx archive replacement.

[plural-copilot]

This PR was generated by the codex Plural Agent Runtime. Here's some useful information you might want to know to evaluate the ai's perfomance:

Name	Details
💬 Prompt	Create ONE focused PR against main to release the runtime chart update required for the EKS 1.35 management ingress blocker. Do not modify any repository except pluralsh/bootstrap. Do not alter encrypted values....
🔗 Run history	View run history