eresearchqut / ddb-repository / 24968862372

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fix: correct TypeScript module resolution for bundler project

Switch tsconfig.json to module=ESNext + moduleResolution=bundler so
TypeScript uses package.json exports fields when resolving types.
This fixes incorrect AWS SDK type resolution (e.g. AttributeValue
appearing as NSMember instead of Record<string, AttributeValue>)
that was caused by the legacy 'node' resolver not understanding
the exports field.

Add tsconfig.test.json (extends tsconfig.json, overrides module back
to CommonJS) and point ts-jest to it, since ts-jest requires CommonJS
module output to run tests with Node.js.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

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