ci: add repo-card refresh stub (MIX-181)

[jordins]

Adds the shared nightly repo-card refresh (MIX-181). Delegates all logic to mixmaxhq/github-workflows/.github/workflows/refresh_repo_card.yml@main; opens a human-reviewed docs: PR only when this repo's CLAUDE.md goes stale. No auto-merge; no CODEOWNERS needed (the card PR is assigned to the code's authors). Manual full re-derive available via the mode: full dispatch input.

[coderabbitai]

Walkthrough

Adds a new GitHub Actions workflow file, refresh-repo-card.yml, triggered on a weekday cron schedule or manual dispatch with mode and base-window-hours inputs. The workflow defines a card job that calls a shared reusable workflow from an external repository, passing the input values (with defaults for scheduled runs) and only the explicitly required secrets.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Related PRs: None mentioned.

Suggested labels: ci, github-actions

Suggested reviewers: None specified.

🐰

A card refreshed at dawn's first light,
Cron ticks softly through the night,
With modes to choose and hours to set,
This little rabbit won't forget,
To hop the workflow, clean and bright.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The PR description is a short summary and misses the required template sections for risks, testing, and release plan.	Fill in the Context/Description, Risks, Testing, and Release Plan sections using the repository template.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly describes the main change: adding a repo-card refresh workflow.
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
• Commit unit tests in branch jordins/MIX-181/repo-card-stub

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

[coderabbitai]

🧹 Nitpick comments (1)

.github/workflows/refresh-repo-card.yml (1)

22-22: 🔒 Security & Privacy | 🔵 Trivial | ⚡ Quick win

Pinning the reusable workflow to @main is a mutable reference.

uses: mixmaxhq/github-workflows/.github/workflows/refresh_repo_card.yml@main tracks a moving branch, so future changes to that shared workflow (including breaking ones) will silently affect this workflow's next scheduled run. Pinning to a release tag or commit SHA improves reproducibility and supply-chain hygiene, even for an internal org repo.

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In @.github/workflows/refresh-repo-card.yml at line 22, The reusable workflow
reference in the refresh-repo-card workflow is pinned to a mutable branch, so
update the uses entry for
mixmaxhq/github-workflows/.github/workflows/refresh_repo_card.yml to a fixed
release tag or commit SHA instead of `@main`. Keep the same workflow target, but
choose an immutable ref so scheduled runs use a reproducible version and are not
affected by upstream branch changes.

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Nitpick comments:
In @.github/workflows/refresh-repo-card.yml:
- Line 22: The reusable workflow reference in the refresh-repo-card workflow is
pinned to a mutable branch, so update the uses entry for
mixmaxhq/github-workflows/.github/workflows/refresh_repo_card.yml to a fixed
release tag or commit SHA instead of `@main`. Keep the same workflow target, but
choose an immutable ref so scheduled runs use a reproducible version and are not
affected by upstream branch changes.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 70b6c495-9623-4418-a833-a4c15c4504bf

📥 Commits

Reviewing files that changed from the base of the PR and between 9539d00 and bcc46b0.

📒 Files selected for processing (1)

• .github/workflows/refresh-repo-card.yml