fix: restore code analyzer ingest

[mzanoni]

https://trello.com/c/imUcysvy/21187-js-sdk-mcp-integration-is-failing

Summary

• Add Node type definitions to packages/code-analyzer and explicitly include Node types in its TypeScript config.
• Fix stricter TypeScript compile errors in analyzer handlers exposed by the upgraded toolchain.
• Keep the generated ingestion payload shape aligned with the analyzer model types by omitting optional values instead of writing null where the model does not allow it.

Root Cause

The MCP ingest workflow runs ts-node ./src/main.ts, which uses Node APIs (fs, process) but code-analyzer did not declare Node typings directly or include them in tsconfig.json. After dependency updates, transitive Node globals were no longer available. The newer TypeScript/tooling also surfaced existing null/undefined mismatches in handler return objects.

Validation

• npm --prefix .\packages\code-analyzer run codeAnalyzer -- '..\client\tsconfig.json' '@relewise/client'
• npm --prefix .\packages\code-analyzer run codeAnalyzer -- '..\integrations\tsconfig.json' '@relewise/integrations'
• npm --prefix .\packages\code-analyzer run lint
• npm --prefix .\packages\code-analyzer audit --audit-level=low