update CLAUDE.md and clean up MCP config

- Fix directory names (adiuva/ → adiuvAI/, adiuva-api/ → api/)
- Document git submodule structure and clone instructions
- Correct Electron architecture (local-first LangGraph, not backend-dependent)
- Add non-obvious gotchas for both projects
- Mark microservices migration as planned but not yet started
- Remove duplicate langfuse-docs MCP definition from settings.json
- Simplify settings.local.json (enableAllProjectMcpServers replaces explicit list)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/settings.local.json

@@ -1,6 +1,3 @@
 {
-  "enabledMcpjsonServers": [
-    "langfuse-docs"
-  ],
   "enableAllProjectMcpServers": true
 }