Add the opt-in inboundDocuments module (off by default, like the MCP
endpoint): ingesting a clinical document egresses it to the OCR/vision
provider, so the surface ships dark and the user turns it on from the
Modules hub. The born-gated /documents page carries the prominent
non-diagnostic disclaimer (we read, we don't interpret; nothing is saved
until you approve it; only your clinician can interpret these results),
uploads a document, and walks each extracted fact: source provenance and
confidence are shown, low-confidence facts are blocked from approval until
edited, and the confirm step commits the approved facts.
