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…"
}