feat: adapter interface contract for ORM adapters#18
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Introduces LedgerAdapter<TDb, TAuditTable, TQueryFilter> in src/core/adapter.ts that codifies the methods any ORM adapter must implement: query filters (notDeleted, onlyDeleted), audit operations (insertAuditEntry, getRecordHistory), GDPR (purgeUserData, isUserDataPurged), and soft-delete automation (createAuditedDb). Includes a type-level compatibility test verifying the Drizzle adapter satisfies the interface via satisfies and assignment checks. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
Defines
LedgerAdapter<TDb, TAuditTable, TQueryFilter>interface insrc/core/adapter.ts. Any ORM adapter (Drizzle, Kysely, future) must implement this contract.Four capability groups, 7 methods:
notDeleted,onlyDeletedinsertAuditEntry,getRecordHistorypurgeUserData,isUserDataPurgedcreateAuditedDbType-level test confirms the Drizzle adapter satisfies the interface.
Excluded from contract (adapter-specific):
AuditLogger(Drizzle Logger), convenience wrappers (logInsertetc.),includingDeleted()(tautology).Test plan