A single dependency-free Node 22 script that copies tagged documents from
Paperless-ngx (REST, original files) or Papra (API key, /file) into the
vault through a document token. Serial, one file in memory, waits on 429
Retry-After, and resumable through the server's source-key dedup. Supports
--since, --kind / --kind-map, --dry-run with sizes, and holds back automatic
AI reading unless --ai-read is given.
Refs #1038
