docs: add rebase requirement and clarify PR monitoring

- Ensure open PR branches are rebased before addressing feedback
- Clarify continuous PR monitoring requirement
- Emphasize not proceeding while open PRs exist

Refs #40

Author: martincjarvis

PROMPT.md

@@ -17,8 +17,9 @@
 >   - Check open PRs created by Contributor account for comments or "Changes requested" reviews
 >   - Implement requested fixes immediately using TDD approach
 >   - Self-verify fixes with `dotnet build --warnaserror && dotnet test`
+>   - Ensure open PR branches are rebased
 >   - Reply to review comments with: "Fixed. Changes verified - ready for re-review."
->   - DO NOT proceed to new tasks while open PRs have unresolved feedback
+>   - DO NOT proceed to new tasks while there are open PR's for previous work continuously monitor the PR and address any process or code issues
 
 </EXTREMELY-IMPORTANT>