docs-validation: expand curated markdown scope to include all documentation hubs

Add all documentation subdirectories to the curated markdown linting targets, replacing the previous exclusion-based approach with comprehensive coverage. Update validation to check for required README files across all hubs and verify priority documentation metadata markers. Implement lazy loading for optional dependencies (numpy, redis, bcrypt, jwt, websockets) in agent-coordinator and related modules to improve startup

docs/packages/README.md

@@ -0,0 +1,57 @@
+# Packages Documentation
+
+**Level**: Intermediate  
+**Prerequisites**: Familiarity with AITBC package management  
+**Estimated Time**: 15-20 minutes  
+**Last Updated**: 2026-04-27  
+**Version**: 1.0
+
+## 🧭 **Navigation Path:**
+**🏠 [Documentation Home](../README.md)** → **📦 Packages** → *You are here*
+
+**breadcrumb**: Home → Packages → Overview
+
+---
+
+## 🎯 **See Also:**
+- **📖 [About Documentation](../about/README.md)** - Template standard and audit checklist
+- **🧭 [Master Index](../MASTER_INDEX.md)** - Full documentation catalog
+- **📁 [Project Documentation](../project/README.md)** - Project-level overview
+- **🔧 [Deployment Documentation](../deployment/README.md)** - Operational rollout guidance
+
+---
+
+## 📦 **Contents**
+
+This directory contains documentation for AITBC packages organized by language and platform:
+
+- **[github/](github/)** - GitHub packages publishing guides and workflows
+- **[js/](js/)** - JavaScript SDK and web client packages
+- **[py/](py/)** - Python packages (aitbc-core, aitbc-crypto, aitbc-agent-sdk)
+- **[solidity/](solidity/)** - Solidity smart contract packages (aitbc-token)
+
+---
+
+## 🧱 **Purpose**
+
+Use this directory for package-specific documentation such as:
+
+- Publishing guides for GitHub Packages
+- SDK installation and usage instructions
+- Package versioning and release notes
+- Cross-language integration examples
+- Dependency management
+
+---
+
+## 🚀 **Next Steps**
+
+- See the specific package subdirectory for detailed documentation
+- Refer to `../deployment/README.md` for production deployment
+- Check `../contracts/` for smart contract documentation
+
+---
+
+*Last updated: 2026-04-27*  
+*Version: 1.0*  
+*Status: Package documentation hub*