Reproduce runtime root ERM build output

[mmkal]

Summary

Replaces #142 with a focused repro of the real runtime-root packaging problem instead of hand-editing selected using sites in source.

The new scripts/repro-runtime-root-using-transform.sh does three things:

1. Runs the real pnpm --filter sqlfu build.
2. Uses esbuild metadata to walk the built dist/index.js import graph.
3. Parses each reachable built dist/*.js file as ES2022 through ESLint's parser.

What It Shows

Current build output still contains explicit resource management syntax in the root runtime import graph:

FAIL: built sqlfu root import graph contains syntax that an ES2022 parser rejects.
Checked 48 built files reachable from dist/index.js.

First failures:
- dist/config-inline.js:56:11 Parsing error: Unexpected token stmt
  using stmt = client.prepare(sql);
- dist/dialect.js:73:25 Parsing error: Unexpected token database
  await using database = await host.openScratchDb('materialize-schema');
- dist/schemadiff/sqlite/index.js:8:17 Parsing error: Unexpected token baseline
  await using baseline = await host.openScratchDb('baseline');

The same script also runs an esbuild target=es2022 probe of the root graph, and that lowered output parses successfully. That supports the likely follow-up fix: keep ERM in authored TypeScript, then transform the built runtime output during pnpm build.

Verification

scripts/repro-runtime-root-using-transform.sh

Expected today: exits 1 with the parse failures above.

Notes

PR #142 is closed. This PR intentionally does not implement the build transform; it gives the next PR a concrete failing signal.

Package size — packed 280.3 kB (no change)

Package size

	main	this PR	Δ
packed	280.3 kB	280.3 kB	0
unpacked	1.12 MB	1.12 MB	0
files	226	226	0

dist/vendor/*.js bundles

	main	this PR	Δ
vendor/sha256.js	4.3 kB	4.3 kB	0
vendor/sql-formatter/*.js	94.5 kB	94.5 kB	0
vendor/sqlfu-sqlite-parser/*.js	17.2 kB	17.2 kB	0
vendor/standard-schema/*.js	2.8 kB	2.8 kB	0
vendor/typesql/*.js	134.8 kB	134.8 kB	0

Measured with npm pack --dry-run --json on sqlfu (0.0.3-7 on main vs 0.0.3-7 on this PR).

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/sqlfu@147

commit: e33c5f3