Media the industry way: the DB stores a reference, bytes live behind a storage port.
- StoragePort + LocalDiskStorage (dev). MediaService presigns short-lived signed
upload/download URLs (HS256 tokens) pointing at IIOS's own endpoints; the bytes
never touch the kernel. Prod swaps STORAGE_PORT to S3/Supabase — same as auth.
- MediaController: presign-upload / PUT upload/:token (raw stream) / GET blob/:token /
presign-download. Uploads are OPA-governed (iios.media.upload: 25 MB cap +
image/video/audio/pdf/office allowlist); downloads are tenant-fenced by object key.
- send() + MessageDto carry an attachment (contentRef/mimeType/sizeBytes → generic
MEDIA_REF/VOICE_REF/FILE_REF part; DTO exposes kind image|video|audio|file).
Tests: media.service.spec (6) — round-trip, oversize/type denied, oversized PUT
refused, tampered token rejected, tenant fence. Full suite 192 green. Verified live:
presign→upload→send→history→signed download round-trips the exact bytes.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
