Upload a file to attach to a support ticket (SUP — ek dosya). Stored tenant-
scoped and *staged* (unbound); the returned attachment is bound to a message by
passing its id in the attachment_ids of a later create/reply. Images + PDF,
≤10 MiB, content type verified by magic bytes (not the client's Content-Type,
SEC-12). Requires core.tenant.view.
curl -X POST "https://api.blesyum.com/api/v1/support/attachments" \
-H "Authorization: Bearer <oturum-token>" \
-H "Accept: application/json"{
"data": "…",
"trace_id": "01JC…"
}