Added isDocker and cloudPlatform fields to session_start telemetry events to enable measurement of the v2.17.1 user ID stability fix.
Changes:
- Added detectCloudPlatform() method to event-tracker.ts
- Updated trackSessionStart() to include isDocker and cloudPlatform
- Added 16 comprehensive unit tests for environment detection
- Tests for all 8 cloud platforms (Railway, Render, Fly, Heroku, AWS, K8s, GCP, Azure)
- Tests for Docker detection, local env, and combined scenarios
- Version bumped to 2.18.1
- Comprehensive CHANGELOG entry
Impact:
- Enables validation of v2.17.1 boot_id-based user ID stability
- Allows segmentation of metrics by environment
- 100% backward compatible - only adds new fields
- All tests passing, TypeScript compilation successful
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Co-Authored-By: Claude <noreply@anthropic.com>