ThingsBoard MCP Server

## Summary Please include a summary of the change and which issue is fixed. ## Type of change - [ ] Bug fix - [ ] Feature / new MCP tool - [ ] Refactor / tech debt - [ ] Docs only ## Checklist - [ ] Code builds on Java 17 / Maven 3.6+ - [ ] Unit tests added/updated (where applicable) - [ ] Docs updated (README, examples, env var notes) - [ ] No breaking API changes (or documented under “Breaking changes”) - [ ] Docker path tested (STDIO and/or SSE as relevant) - [ ] Security considerations reviewed (no secrets in code/logs) ## Breaking changes (if any)