V48 (impl-only): Fix Sandbox ESM loader typecheck for CI #1413

Job	Run time
Lint, Type-Check & Build	2m 47s
Validate GitHub Actions workflows	16s
CodeQL Analysis	-5s
Unit & Integration Tests (mocks)	58s
Super Linter (misc files)	-1s
E2E, Visual & DB Tests	0s
	3m 55s

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