Fixed 29 TypeScript compilation errors in test files:
**breaking-change-detector.test.ts** (22 errors):
- Added missing `nodeType`, `fromVersion`, `toVersion` to BreakingChange objects
- All 22 BreakingChange object instantiations now comply with interface
**node-migration-service.test.ts** (3 errors):
- Added type assertions for dynamic property assignment in tests
- Lines 310, 396, 519: `(node as any).property = value`
**workflow-versioning-service.test.ts** (5 errors):
- Fixed N8nApiClient constructor: takes config object, not separate params
- Fixed updateWorkflow mock: returns Workflow object, not undefined
All tests now compile successfully with `npm run typecheck`.
Conceived by Romuald Członkowski - www.aiadvisors.pl/en
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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