whetstone_DSL/tmp_eval_complex_specs_20260303/fs_004_java.md

Schema Migration with Backfill (fs_004)

Objective

Add normalized address schema, migrate legacy rows with backfill job, dual-read/write transition, and rollback script.

Language & Library Constraints

• Primary language: java
• Available libraries: spring-boot, jooq, flyway
• Prefer explicit use of selected library APIs in task execution contracts.

Required Artifacts

• db/migrations/*
• service/address/*
• jobs/backfill/*
• rollback/*.sql
• tests/migration/*

Acceptance

• Generate deterministic taskitems with strict execution contracts.
• Include selected library and preferred APIs per task where applicable.