Resolve "Verifying and sharing custom override yaml from within development-maintenance.md is difficult" | SKIP UPDATE

General MR

Summary

Ideally this will make our "works on my machine, maybe your overrides are wrong/out of date/out of order" problems a little bit less frequent.

• extracts the primary >100-line YAML fixture from DEVELOPMENT_MAINTENANCE.md over to a standalone file at docs/development-values.yaml.
• Replaces the yaml fixture in the DEVMAINT doc with a direct link to the extracted .yaml file.
• Adds sample helm upgrade invocations in both the DEVMAINT markdown file and the new yaml values file.

Relevant logs/screenshots

Click to see the proposed DEVELOPMENT_MAINTENANCE.md rendered for this branch.

Linked Issue

Closes #271 (closed)

Upgrade Notices

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