- Changed primary key from composite (file_no, version) to auto-increment id
- A pension can have multiple vesting schedule entries (e.g., vests 20% at year 1, 100% at year 5)
- Added index on (file_no, version) for efficient lookups
- Successfully imported 502 vesting schedule entries for 416 unique pensions
- Some pensions have up to 6 vesting milestones
