Update connection parameters

Update the title and/or connection parameters of an existing destination connection.

connection_params is merged at field level: only the fields present in the payload are updated, omitted fields keep their current values. To change a single setting, send just that field — e.g. {"connection_params": {"partition_by": "by_month"}}.

Notes:

• Unknown field names are rejected with 400.
• Secret fields cannot be updated one at a time — if any secret field is present in the payload, all required secret fields must be sent together. For s3 that means aws_access_key_id, aws_secret_access_key and encryption_key always travel as a trio (keep encryption_key: "stub" unless you use a customer-managed KMS key). Omit secret fields entirely to keep the stored values.
• improvado_assume_role_arn and improvado_assume_role_externalid are managed by Improvado and cannot be changed through this endpoint.
• A successful update resets the connection status and triggers a connection re-check.

See the create endpoint for the full list of connection_params fields per destination.