docs: add Dependabot configuration documentation

[github-actions]

Summary

Adds comprehensive documentation for the .github/dependabot.yml configuration file that was introduced in commit 30d356b.

Changes Made

Documentation Updates

1. workflow-reference.md - Added new "Dependabot Configuration" section including:

   • Complete configuration file walkthrough
   • Explanation of current settings (GitHub Actions monitoring, weekly schedule)
   • Customization examples for adding new package ecosystems
   • List of all supported package ecosystems
   • Common schedule options
   • Link to official GitHub documentation

2. automation-overview.md - Enhanced "Dependabot Auto-Merge" section with:

   • Brief configuration summary
   • Cross-reference link to detailed configuration documentation in workflow-reference.md

Documentation Gap Addressed

Prior to these changes, the documentation covered:

• ✅ Dependabot Auto-Merge workflow (how PRs are automatically merged)
• ✅ Dependabot labels and PR behavior

But was missing:

• ❌ Documentation of the .github/dependabot.yml configuration file itself
• ❌ What ecosystems are monitored (GitHub Actions)
• ❌ Schedule configuration (weekly on Mondays at 9 AM Central)
• ❌ How to customize for additional package ecosystems

This PR fills that documentation gap.

Testing

• Documentation follows existing style and structure
• Cross-references are accurate
• Code examples use proper markdown formatting (4 backticks)
• Information matches actual configuration in .github/dependabot.yml

Related Files

• .github/dependabot.yml - Configuration file being documented
• docs/workflow-reference.md - Primary documentation update
• docs/automation-overview.md - Cross-reference added

---

Note: This is a documentation-only change with no functional impact.

AI generated by Update Docs

[zircote]

Documentation update looks good.

[Copilot]

Pull request overview

Adds documentation describing the repository’s Dependabot configuration (.github/dependabot.yml) and links it from the automation overview so contributors can understand/adjust dependency update monitoring.

Changes:

• Documented the current Dependabot config (ecosystem, schedule, grouping, labels, reviewers) in docs/workflow-reference.md.
• Added a short Dependabot configuration summary and cross-reference link in docs/automation-overview.md.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
docs/workflow-reference.md	New “Dependabot Configuration” section with config walkthrough and customization guidance.
docs/automation-overview.md	Adds a brief Dependabot configuration summary and link to the detailed reference section.

[Copilot]

The docs say Dependabot “applies dependencies and github-actions labels”, but this repo’s .github/labels.yml doesn’t define either label. If label sync is used, these labels won’t exist and Dependabot won’t be able to apply them. Consider either adding these labels to .github/labels.yml or adding a note here that the labels must exist in the repo before Dependabot can apply them.

Suggested change

	- Applies `dependencies` and `github-actions` labels
	- Applies `dependencies` and `github-actions` labels if they exist in the repository (ensure they are defined in `.github/labels.yml` when using label sync)

[Copilot]

This “Supported ecosystems” list looks like it’s intended to be comprehensive, but it omits several Dependabot ecosystems (e.g., nuget, terraform, gitsubmodule, etc.). To avoid stale/inaccurate docs, either clarify that this is a non-exhaustive list of common ecosystems or replace it with a link/summary that points readers to the official GitHub list for the complete set.

[Copilot]

This section says Dependabot applies both dependencies and github-actions labels, but later in the same doc the “Workflow Labels” table only documents the dependencies label. Consider documenting github-actions there as well (or adjusting this bullet) so the labeling story stays consistent for readers.