fix(review-pr): bump actions/cache to v5.0.5 (Node 24)

[skykelsey]

Summary

Bumps actions/cache/restore and actions/cache/save from v4.2.0 to v5.0.5 in review-pr/action.yml and review-pr/reply/action.yml. The v5 line of actions/cache is the explicit migration to the Node.js 24 runtime — v4 runs on Node.js 20, which GitHub is deprecating.

Why

Every consumer of cagent-action surfaces this warning on every PR-review run today:

Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: actions/cache/restore@1bd1e32a3bdc45362d1e726936510720a7c30a57, actions/cache/save@1bd1e32a3bdc45362d1e726936510720a7c30a57. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Node.js 20 will be removed from the runner on September 16th, 2026.

Reference: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Originally observed on docker/data-platform PR #701 but it surfaces on every PR-review run across every consumer.

Compatibility

actions/cache@v5 (release notes):

actions/cache@v5 runs on the Node.js 24 runtime and requires a minimum Actions Runner version of 2.327.1.

GitHub-hosted ubuntu-latest runner is currently at 2.334.0 (well above the floor). No API surface changes between v4 and v5 — the only breaking change is the Node.js 24 runtime requirement.

Changes

All occurrences of actions/cache/restore@1bd1e32a... # v4.2.0 and actions/cache/save@1bd1e32a... # v4.2.0 bumped to @27d5ce7f... # v5.0.5:

File	Hits
review-pr/action.yml	4 (lines 142, 181, 198, 785)
review-pr/reply/action.yml	2 (lines 65, 98)

Test plan

• CI runs PR-review on this PR — the deprecation warning should no longer appear in the log.
• Verify cache restore/save still hit and miss correctly across a fresh run (a cleared cache should miss; a subsequent run should hit).

Related

• Originally filed as docker/actions#383 — closed as misdirected; the deprecated pin lives here in cagent-action, not in docker/actions.

🤖 Generated with Claude Code

[docker-agent]

Assessment: 🟢 APPROVE

No issues found in the changed code. All six occurrences of actions/cache have been consistently updated from the v4.2.0 SHA (1bd1e32a) to the v5.0.5 SHA (27d5ce7f), SHA pins and version comments are in sync, and the v5 API surface (path, key, restore-keys, cache-hit) is fully compatible with existing usage.

[docker-agent]

Assessment: 🟢 APPROVE

This PR bumps actions/cache/restore and actions/cache/save from v4.2.0 to v5.0.5 across both review-pr/action.yml and review-pr/reply/action.yml. All 6 occurrences were updated consistently to the same SHA (27d5ce7f) with matching # v5.0.5 version comments. No v4 pins remain, no interface changes are introduced, and the migration is straightforward and correct.