- GET /api/document-types: returns {id, name, code} from
leaudit_document_types, with optional ?ids=1,2,3 filter
- GET /api/documents/list: added userId, dateFrom, dateTo
query params for filtering by uploading user and date range
17-table PostgreSQL schema with full Chinese column comments,
FastAPI project structure (admin/common/modules),
DSL rule files, and schema migration scripts.