docs: add Session 5 competitive analysis to AMELIORATIONS.md

Analyzed latest features from competitors (January 2026):

Claude Code:
- TeammateTool/Swarms multi-agent orchestration (hidden)
- Task DAG system with dependency tracking
- Async messaging for background agents
- MCP Tool Search Auto Mode
- Plugin SHA pinning and search
- Setup Hook events
- Analytics Admin API

Droid (Factory.ai):
- /share with clipboard, /create-skill guided flow
- Batched tool permissions
- Multi-option spec mode
- Claude Code hooks auto-migration
- Skills system Claude Code-compatible

OpenCode:
- Agent attach to backend
- GitHub Agent install/run
- Session export/import
- MCP OAuth management
- Web interface with mDNS

Codex:
- Network sandbox proxy with policy enforcement
- Collaboration Mode (beta)
- Dynamic tools injection at startup
- Multi-agent collaboration enhancements
- Team Config for shared configuration

Updated statistics and prioritizations for Session 5.

Author: factorydroid