Syncable Entity: Runner & Actions (Step 4/6)

Purpose: Execute migration actions against the database with proper transpilation from universal to flat entities.

When to use: After completing Steps 1-3 (Types, Cache, Builder). Required before integration.

Quick Start

This step creates:

1. Create action handler
2. Update action handler
3. Delete action handler
4. Universal-to-flat conversion utilities

Key pattern: Each handler has two phases:

1. Transpilation: Universal action → Flat action
2. Execution: Flat action → Database operation