Add bulk import command, gateway migrate-provider, and API debug logging

Bump version to 1.2.3 and sync release version from git tag

v1.1.0 - Device Templates, Codecs, Registry, Gateways, and LLM Integr…

…ation

New Features:
- Device templates with capabilities and datatypes management
- Codec management with decode/encode testing and validation
- Template scaffold-decoder to generate decoder.js skeletons
- Device registry for pre-provisioning with networks support
- Gateway commands with ping histogram and packet statistics
- Shell completions for bash, zsh, and fish
- LLM integration with describe command and MCP server

Commands Added:
- templates (list, get, create, update, delete, assign-codec, scaffold-decoder)
- templates datatypes (list, get)
- templates capabilities (list, create, update, delete)
- codecs (list, get, create, update, delete, decode, encode)
- registry (list, get, create, unpair, networks)
- gateways (list, get, pings, stats)
- completion (bash, zsh, fish)
- describe (--json, --yaml, --markdown)

initial cli commit