docs: add HUB_STATUS.md documenting repository transition to sync hub

- Add HUB_STATUS.md file documenting hub-only configuration
- Document removal of localhost development services and runtime components
- List removed systemd services (coordinator, registry, AI service, blockchain node, etc.)
- Document preserved source code directories (apps, cli, infra, scripts, dev, config)
- Clarify repository now serves as Gitea ↔ GitHub synchronization hub
- Add warnings against local development attempts
- Document hub operations

HUB_STATUS.md

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+# AITBC Repository - Hub Status
+
+## 🚨 IMPORTANT: This repository is now a HUB ONLY
+
+This repository is no longer a development environment. It serves as a **hub between Gitea and GitHub** for:
+
+- Code synchronization between Gitea and GitHub
+- Issue tracking and project management
+- Documentation storage
+- Release management
+
+## ❌ Removed Components
+
+All localhost development services have been removed:
+
+### Services Removed
+- aitbc-agent-coordinator.service
+- aitbc-agent-registry.service  
+- aitbc-ai-service.service
+- aitbc-blockchain-node-test.service
+- aitbc-coordinator-api.service
+- aitbc-exchange.service
+- aitbc-explorer.service
+- aitbc-marketplace-enhanced.service
+
+### Directories Removed (Runtime Components Only)
+- Runtime virtual environments (`.venv/`)
+- Application logs and data files
+- Systemd service files
+- Python bytecode cache files
+
+### Directories Preserved (Source Code)
+- `/apps/` - Application source code (preserved for hub operations)
+- `/cli/` - Command line interface source code (preserved for hub operations)  
+- `/infra/` - Infrastructure configuration (preserved for hub operations)
+- `/scripts/` - Development and deployment scripts (preserved for hub operations)
+- `/dev/` - Development environment setup (preserved for hub operations)
+- `/config/` - Configuration templates (preserved for hub operations)
+
+### System Changes
+- All systemd service files removed
+- All Python bytecode cache files cleaned
+- All running processes stopped
+
+## ✅ What Remains
+
+The repository now contains source code and hub infrastructure:
+
+- **Source Code** in `/apps/`, `/cli/`, `/packages/`, `/contracts/`, `/plugins/`
+- **Documentation** in `/docs/`
+- **Tests** in `/tests/`
+- **Infrastructure** in `/infra/` (deployment configs, Helm charts, Terraform)
+- **Scripts** in `/scripts/` (development, deployment, maintenance)
+- **Development Setup** in `/dev/` (environment configuration)
+- **Website** in `/website/`
+- **Git configuration** for hub operations
+- **CI/CD workflows** for automated sync
+
+## 🔄 Hub Operations
+
+This repository now operates as:
+
+1. **Gitea ↔ GitHub Sync**: Automatic bidirectional synchronization
+2. **Issue Management**: Centralized issue tracking
+3. **Release Management**: Automated release publishing
+4. **Documentation Hub**: Central documentation storage
+
+## 🚫 No Local Development
+
+**DO NOT** attempt to run AITBC services locally. All development should happen in:
+- Containerized environments
+- Remote servers
+- Cloud deployments
+
+## 📞 Support
+
+For development environments and deployments, refer to:
+- Production deployment guides in `/docs/`
+- Container setups in `/deployment/`
+- Release notes in `/RELEASE_v*.md`
+
+---
+
+**Status**: Hub-Only Configuration  
+**Last Updated**: 2026-03-23  
+**Purpose**: Gitea ↔ GitHub Synchronization Hub