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Openai/69111a25-dab4-8000-8929-8d5e16a9da88
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==== - Validation service: lightweight microservice (Python/Go) using schema validation (JSON Schema or Pydantic), run as part of ingestion pipeline. ==== * Use an HSM/KMS-backed service to perform Luhn or PAN checks without exposing PAN in logs. * Use background job queue for enrichment (BIN lookup) and synchronous hard-fail on critical faults. * Store master data in secure DB with column-level encryption for PAN fields, and token-only values in application DB (no PAN storage unless strictly required and in vault). * Expose a small administration UI for data stewards to view PENDING_REVIEW items and perform actions (re-issue, block, mark test).
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