P0: Fix validation bypass - validated properties now override raw properties P1: Add unit tests for shared-analytics package (3 test files) P1: Refactor spamshield to use shared-analytics, deprecate duplicate P2: Normalize phone numbers to E.164 before hashing P2: Add graceful error handling for missing env vars in config P3: Add singleton pattern to MixpanelService P3: Include timestamp in validated properties schema