feat: add Chatwoot integration with diagnostic tool and templates

[RenatoAscencio]

Summary

Adds a comprehensive Chatwoot integration module to n8n-MCP:

• Connection validator — tests Application + Platform API credentials with 10s timeout, error classification (network/dns/timeout/ssl/auth), HTTP status mapping, and secret sanitization
• 5 workflow templates for common Chatwoot automation patterns (monitoring, sync, messaging, auto-assignment, public API)
• chatwoot_doctor MCP tool — diagnostic tool for troubleshooting (server info, n8n connectivity, credential detection, template verification, optional Chatwoot API test)
• 19 unit tests with 88% statement coverage

Files added/modified

src/integrations/chatwoot/
├── index.ts                    # Integration entry point + metadata
├── chatwoot-integration.ts     # Template registry + connection validation
├── connection-validator.ts     # Multi-credential testing with error classification
└── workflow-templates.ts       # 5 production-ready workflow templates

src/mcp/
├── tools-chatwoot.ts           # chatwoot_doctor tool definition
├── handlers-chatwoot.ts        # chatwoot_doctor handler (195 lines)
└── server.ts                   # +12 lines: tool registration

tests/
├── handlers-chatwoot.test.ts          # 7 tests for chatwoot_doctor
└── chatwoot-connection-validator.test.ts  # 12 tests for connection validator

README.md                       # +39 lines: integration docs + troubleshooting

Companion package

Designed for @renatoascencio/n8n-nodes-chatwoot v0.4.1 — 27 resources, 130+ operations across Chatwoot's Application, Platform, and Public APIs.

Verification

• npm run build — compiles cleanly
• npm run lint — no errors
• 19/19 Chatwoot tests pass (88% coverage)
• Tested live: chatwoot_doctor reports healthy, templates available, n8n API connected
• End-to-end: chatbot workflow using Chatwoot node responds to Telegram messages via Chatwoot

Test plan

• npm run build passes
• npm test — existing tests unaffected, 19 new Chatwoot tests pass
• Import a workflow template into n8n with @renatoascencio/n8n-nodes-chatwoot installed
• Run chatwoot_doctor tool to verify integration health

🤖 Generated with Claude Code