docs: document create_labels in agentics-maintenance workflow

[github-actions]

Summary

• Document the manual workflow_dispatch operations supported by agentics-maintenance in docs/workflows/gh-agent-workflows.md.
• Add guidance for create_labels, including when to use it (initial setup or missing-label recovery).
• Clarify guardrails for this path: it runs only on non-fork repositories and enforces the same admin/maintainer membership check used by other manual maintenance operations.

Verification

• Attempted docs build before and after this change:
  • PATH=/home/runner/.local/bin:$PATH UV_CACHE_DIR=/tmp/gh-aw/agent/uv-cache make docs-build
• Build fails in strict mode due to pre-existing warnings about missing docs/workflows/detector-fixer-chaining.md targets in other workflow docs (code-complexity-detector.md, newbie-contributor-patrol.md, scheduled-fix.md, test-coverage-detector.md).

Closes #883

---

The body of this PR is automatically managed by the Trigger Update PR Body workflow.

[coderabbitai]

Caution

Review failed

Pull request was closed or merged during review

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: ffb2e797-7409-43cf-be5c-f291a0316987

📥 Commits

Reviewing files that changed from the base of the PR and between 17f7a24 and fd1270e.

📒 Files selected for processing (1)

• docs/workflows/gh-agent-workflows.md

---

📝 Walkthrough

Walkthrough

Documentation was added to docs/workflows/gh-agent-workflows.md detailing the agentics-maintenance.yml workflow's manual workflow_dispatch capabilities. The update documents two dispatch actions: safe_outputs for replaying outputs from a specified workflow run via run_url, and create_labels for creating missing repository labels. Usage guidance specifies when create_labels should run (post-installation or after label removal) and constraints that apply to both actions (non-fork repositories and admin/maintainer membership requirements). This is a documentation-only change with no modifications to workflow logic or exported entities.

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	PR documentation updates align with issue #883 requirements: documents create_labels operation, provides usage guidance, and clarifies permissions/actor constraints.
Out of Scope Changes check	✅ Passed	Changes are scoped exclusively to documentation (docs/workflows/gh-agent-workflows.md); no unrelated or out-of-scope modifications present.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/issue-883-create-labels-48cb81f717b08b7b

• 🛠️ Update Documentation: Commit on current branch
• 🛠️ Update Documentation: Create PR

---

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