feat(WHE-23): add hybrid purchase parser with persisted parse metadata

packages/application/src/index.ts

@@ -1 +1,9 @@
 export { calculateMonthlySettlement } from './settlement-engine'
+export {
+  parsePurchaseMessage,
+  type ParsedPurchaseResult,
+  type ParsePurchaseInput,
+  type ParsePurchaseOptions,
+  type PurchaseParserLlmFallback,
+  type PurchaseParserMode
+} from './purchase-parser'