docs: reorganize project documentation structure

Documentation Reorganization (9 files moved with git mv):
- Technical docs → docs/technical/ (4 files)
  - technical-debt-analysis.md, tech-debt-summary.md
  - refactoring-analysis-phase5.md, refactoring-analysis-v0.7.0.md
- Engineering docs → docs/engineering/ (1 file)
  - release-quickstart.md
- Phase planning → to-dos/protocol/ (2 files)
  - phase-10-progress.md, phase-10-session-2-summary.md
- Completed sessions → to-dos/completed/ (2 files)
  - phase-10-session-3.4-complete.md, session-3.4-summary.md

New Documentation:
- docs/technical/README.md - Technical docs index
- to-dos/completed/README.md - Completed phases index

Root Directory Cleanup:
Before: 17 markdown files
After: 8 standard GitHub files (README, CHANGELOG, CONTRIBUTING,
       CODE_OF_CONDUCT, SECURITY, CLAUDE, GEMINI, CLAUDE.local)

Claude Memory Banks Updated:
- CLAUDE.md: v0.9.0 status, new directory structure, 1,025+ tests

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: doublegate

RELEASE_QUICKSTART.md docs/engineering/release-quickstart.mdRELEASE_QUICKSTART.md renamed to docs/engineering/release-quickstart.md

@@ -0,0 +1,19 @@
+# Technical Documentation
+
+Technical analysis, debt tracking, and refactoring documentation for WRAITH Protocol.
+
+## Contents
+
+### Technical Debt Analysis
+- **technical-debt-analysis.md** - Comprehensive technical debt analysis across all crates
+- **tech-debt-summary.md** - Summary of technical debt items and priorities
+
+### Refactoring Documentation
+- **refactoring-analysis-phase5.md** - Phase 5 refactoring analysis (Discovery & NAT Traversal)
+- **refactoring-analysis-v0.7.0.md** - v0.7.0 refactoring analysis
+
+## Related Documentation
+
+- **Planning:** See `/to-dos/technical-debt/` for technical debt action plans and todo lists
+- **Architecture:** See `/docs/architecture/` for architecture documentation
+- **Engineering:** See `/docs/engineering/` for release and engineering processes

docs/technical/README.md

@@ -0,0 +1,23 @@
+# Completed Phase Summaries
+
+Session summaries and completion reports for finished phases of WRAITH Protocol development.
+
+## Phase 10 Completions
+
+- **phase-10-session-3.4-complete.md** - Session 3.4 completion summary (Integration Testing)
+- **session-3.4-summary.md** - Detailed Session 3.4 summary
+
+## Overview
+
+This directory contains summaries of completed development sessions and phases. These documents provide:
+- Completion metrics and statistics
+- Key deliverables and accomplishments
+- Test results and quality metrics
+- Integration points and dependencies
+
+## Active Planning
+
+For ongoing phase planning and progress tracking, see:
+- **Active Phases:** `/to-dos/protocol/` - Phase planning documents
+- **Progress Tracking:** `/to-dos/protocol/phase-10-progress.md` - Current phase progress
+- **Session Summaries:** `/to-dos/protocol/phase-10-session-2-summary.md` - Recent session summaries