curl --location '/api/blobs//relations' \
--header 'X-Temper-Surface;' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '{
"confidence": null,
"correlation_id": null,
"invocation_id": null,
"model": "string",
"persona": "string",
"rationale": "string",
"reasoning": "string",
"direction": "blob_as_source",
"edge_kind": "express",
"label": "string",
"peer_id": "118d4485-cd94-4ecd-b71e-80f79647bc58",
"peer_table": "string",
"polarity": "forward",
"weight": 0
}'