Update Protocol Optimization Report with verification assessment and concrete development plan

- Add verification assessment section with source code scan results
- Correct factual inaccuracies (file counts, line counts, file locations)
- Mark already-implemented items (cursor pagination, plugin registry)
- Re-prioritize improvement roadmap based on verified findings
- Add Sprint-level development plan (10 sprints across 3 phases)
- Update industry comparison table with verification notes

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot