Purpose: Data architecture, entity-relationship model, data dictionary, classification/retention rules, and the baseline SQL schema.
What belongs here: Data domain diagrams, entity definitions, retention/classification policy, and the sample DDL (explicitly a technical baseline requiring DBA/security review).
What must not be stored here: Real data of any kind, actual migration scripts for a live database (those belong with the backend implementation once it exists), secrets/connection strings.
Owner: [TENANT_CONFIGURATION_REQUIRED — Data Architecture / DBA]
Main dependencies: docs/05-security-governance/privacy-and-pii-handling.md, config/schemas/retention-policy.schema.json, the backend persistence layer once implemented.
Contents: data-architecture.md · er-diagram.md · data-dictionary.md · data-classification-and-retention.md · data-quality-rules.md · audit-log-specification.md · database-migration-strategy.md · master-data-management.md · sample-relational-schema.sql
Status: Initial scaffold — details to be added during implementation.