Replace the freetext CSV signer-names field with a structured recipient
editor (name / email / role per row). Service now persists each
non-CC signatory as a `document_signers` row pre-stamped
`status='signed'` so the document-detail "X / Y signed" badge counts
correctly for manually-uploaded EOIs.
- ExternalEoiInput gains a structured `signatories` field; legacy
`signerNames` retained for back-compat. Role enum:
`client | developer | rep | witness | cc`.
- uploadExternallySignedEoi inserts `document_signers` rows for every
non-CC entry inside the existing transaction.
- documentEvents.completed event records both shapes for full audit
fidelity.
- POST /api/v1/interests/[id]/external-eoi parses the `signatories`
JSON multipart field defensively; malformed payloads fall back to
signerNames.
- Dialog UI: per-row Name / Email / Role inputs with add / remove.
Seeds from interest's clientName + clientPrimaryEmail via a
signatoriesOverride/null pattern (React-Compiler safe — no
setState-in-effect).
tsc clean. 1419/1419 vitest pass.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>