AMP-504 Forward rawPayload from File Service in PCR subscription notification

[srivanimuddineni]

JIRA

AMP-504

What changed

• FileService.java: injected FileRetriever alongside existing FileStorer; added retrievePayload(UUID) method that reads the stored JSON payload back from File Service
• PcrEventPayload.java: added Map<String, Object> rawPayload field to the Lombok builder DTO
• HearingResultsDocumentSubscriptionPCRMapper.java: updated mapPcrForhearingResultsDocument to 4-arg signature accepting rawPayload; fixed pre-existing bug where timestamp was always set to Instant.now() instead of the createdAt parameter
• PrisonCourtRegisterEventProcessor.java: injected ObjectMapper; in sendPrisonCourtRegisterV2() now fetches rawPayload from File Service via fileService.retrievePayload(fileId) before calling the mapper; falls back to the v2 event JSON itself if File Service returns empty
• Tests: FileServiceTest (+2 retrieve tests), HearingResultsDocumentSubscriptionPCRMapperTest (updated to 4-arg + 2 new tests), PrisonCourtRegisterEventProcessorTest (all V2 tests updated to 4-arg + 2 new rawPayload assertion tests)

Why it's needed

The downstream subscription service (service-cp-crime-hearing-results-document-subscription) requires a rawPayload field on inbound EventPayload POSTs so consumers can retrieve the full PCR source data via GET /notifications/{notificationId}/payload. The mappedPayload is already stored in File Service by generatePrisonCourtRegister() and its fileId is carried in every prison-court-register-generated-v2 event — this change wires up the retrieval with no event store, schema, or aggregate changes.

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