fix: remove PII console.log from edit-resolution handler

From the PR description

Summary

• Removed all console.log calls from the handleEditResolution handler that emitted userId, documentId, editId, and internal state at INFO level
• These were written during development; in production they link user identities to legal document activity in any log aggregator, conflicting with data minimization under GDPR
• console.error calls in other handlers (storage, conversion) are untouched - those are genuine failure signals
• Also excludes src/**/__tests__/** from TypeScript compilation so test-only ESM syntax doesn't break the build
• Restores error handling for both document_edits UPDATE calls that were silently swallowed after log removal
• Fixes test isolation (was searching for wrong function name resolveEditHandler, now correctly targets handleEditResolution)

Closes #71 Closes #86 Closes #94

Changes

• backend/src/routes/documents.ts - all console.log statements removed from handleEditResolution; DB error handling restored for both UPDATE calls
• backend/tsconfig.json - test directories excluded from tsc include
• backend/src/lib/__tests__/editResolutionLogging.test.ts - 3 static-analysis tests verifying no PII in handler source; function name corrected

Test plan

• Static analysis tests: no console.log with userId/editId/documentId in handler
• Build and typecheck pass