- Extract INSERT_MIGRATION_SQL constant; was repeated three times.
- Hoist db.exec(SCHEMA_MIGRATIONS_DDL) above the genesis-stamp branch
so it is no longer duplicated in both arms of the if/else.
- Prepare insertRow once and reuse it for both genesis-stamping and
the per-file insert in the apply loop.
- Simplify existence probe in stampMigration to SELECT 1 and drop the
misleading MigrationRow cast (only existence was checked).
Pre-compiled ESM JS + .d.ts from tsconfig.build.json. Consumers install
via 'git+https://gitea.bchen.dev/...#v0.1.0' so the built output must
travel with the source. CI verifies in-sync via 'git diff --exit-code
dist/'.
