The post_document endpoint does not support setting ownership on upload,
so after a successful upload the document is PATCHed to set the owner.
Add optional PAPERLESS_OWNER_ID env var. When set, every newly uploaded
document is assigned to that Paperless user ID via PATCH /api/documents/{id}/.
Bot that monitors a Matrix room for PDF and JPEG files and uploads
them to Paperless-ngx. Supports E2E encrypted attachments via inline
AES keys, historical catchup on startup, exponential backoff retries
with a permanent give-up after max attempts, file format validation
via magic bytes, Uptime Kuma heartbeat monitoring, and email alerts
on errors via SMTP SSL.
