further lamdba fixes

Author: nhsd-david-wass

lambdas/api-handler/package.json

@@ -7,6 +7,7 @@
     "@aws-sdk/s3-request-presigner": "^3.925.0",
     "@internal/datastore": "*",
     "@internal/helpers": "*",
+    "aws-lambda": "^1.0.7",
     "esbuild": "^0.25.11",
     "pino": "^9.7.0",
     "zod": "^4.1.11"

lambdas/letter-updates-transformer/src/mappers/__tests__/letter-mapper.test.ts

@@ -20,7 +20,7 @@ describe("letter-mapper", () => {
     $LetterEvent.parse(event);
     expect(event.type).toBe("uk.nhs.notify.supplier-api.letter.PRINTED.v1");
     expect(event.dataschema).toBe(
-      `https://notify.nhs.uk/cloudevents/schemas/supplier-api/letter.PRINTED.${event.dataschemaversion}.schema.json`
+      `https://notify.nhs.uk/cloudevents/schemas/supplier-api/letter.PRINTED.${event.dataschemaversion}.schema.json`,
     );
     expect(event.dataschemaversion).toBe("1.0.7");
     expect(event.subject).toBe("letter-origin/supplier-api/letter/id1");