feat(db): AWS公式Drizzleアダプターに移行する

### Problem

2026/8/25にDrizzleアダプターがサポートされた。 https://docs.aws.amazon.com/aurora-dsql/latest/userguide/release-notes.html

現状の自作のlinter, migratorを置き換えられるか調査する https://github.com/awslabs/aurora-dsql-orms/tree/main/node/drizzle

### Proposed solution

可能な限り独自実装を減らし、公式に寄せる

### Evidence of general need (optional)

_No response_

### Alternatives considered (optional)

_No response_

Inspect the current custom linter and migrator, then compare their responsibilities with the AWS adapter in the referenced node/drizzle directory. Done means determining whether the official adapter can replace them and documenting or implementing the migration needed to reduce the custom code.

Written by the indexing model from the issue text.