Reorganize repository structure and clean up documentation

Clean up and organize the flask-shopdb repository for better
maintainability and discoverability:

## Changes

- Update .gitignore for build artifacts (publish/, data/, 122M total)
- Reorganize .claude/ into 6 subdirectories with README navigation
- Consolidate overlapping MCP setup guides into MCP-QUICK-START.md
- Move deployment docs from root to docs/deployment/
- Archive dated status reports to .claude/archived/
- Delete temporary files (logs, backups, empty reports, ~50K)

## New Structure

.claude/ organized into:
- setup/ - MCP, VM, Hyper-V, GitHub setup guides + scripts (17 files)
- plans/ - Feature plans and protocols (5 files)
- maintenance/ - Deployment checklists and reports (4 files)
- archived/ - Historical documentation (9 files)
- skills/ - Claude Code automation (5 files)
- workflows/ - Security audit workflow (1 file)

docs/deployment/ created with 6 deployment guides:
- LOCAL-DEV-SETUP.md, DOCKER-SETUP.md, DOCKER-PREBUILT-APPROACH.md
- PRODUCTION-READINESS.md, DEPLOY-TO-VM.md, README.md

Root directory cleaned to essential docs only:
- CLAUDE.md, README.md, CONTRIBUTING.md, CHANGELOG.md

Benefits:
- Clear navigation via README.md in each subdirectory
- No duplicate/overlapping documentation
- Large artifacts properly gitignored (won't bloat repository)
- Historical context preserved in archived/

See .claude/CLEANUP-SUMMARY.md for complete details.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

docs/deployment/README.md

@@ -0,0 +1,29 @@
+# ShopDB Deployment Documentation
+
+Complete deployment guides for development, Docker, and production environments.
+
+## Quick Start
+
+**Local development**: `LOCAL-DEV-SETUP.md`  
+**Docker deployment**: `DOCKER-SETUP.md`  
+**VM deployment**: `DEPLOY-TO-VM.md`
+
+## Docker Deployment
+
+- `DOCKER-SETUP.md` - Complete Docker setup and configuration
+- `DOCKER-PREBUILT-APPROACH.md` - Workaround for corporate proxy blocking npm in Docker
+- `PRODUCTION-READINESS.md` - Production deployment checklist
+
+## Development
+
+- `LOCAL-DEV-SETUP.md` - Setting up local development environment (Flask + Vite)
+
+## VM Deployment
+
+- `DEPLOY-TO-VM.md` - Deploying the C# endpoint agent to test VMs
+
+## Related Documentation
+
+- `.claude/setup/` - MCP servers, VM configuration, and development tools
+- `.claude/maintenance/` - Operational checklists and maintenance procedures
+- `../shopdb-flask.wiki/ADR-004-deployment-topology.md` - Architecture decision record for deployment topology