Resolve a proposal

curl --request POST \
  --url https://api.fortressproductivity.com/v1/proposals/{id}/resolve \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "resolution_summary": "<string>"
}
'

{
  "proposal": {
    "id": "<string>",
    "workspace_id": "<string>",
    "kind": "proposal",
    "agent_id": "<string>",
    "created_by_actor_id": "<string>",
    "assigned_actor_id": "<string>",
    "updated_by_actor_id": "<string>",
    "response_comment": "<string>",
    "responded_at": "2023-11-07T05:31:56Z",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z",
    "action_id": "<string>",
    "project_id": "<string>",
    "order_id": "<string>",
    "title": "<string>",
    "description": "<string>",
    "external_system": "<string>",
    "external_resource": "<string>",
    "external_source_key": "<string>",
    "external_url": "<string>",
    "external_intent_kind": "<string>",
    "external_intent_body": "<string>",
    "consumed_at": "2023-11-07T05:31:56Z",
    "resolved_at": "2023-11-07T05:31:56Z",
    "resolved_by_actor_id": "<string>",
    "resolved_action_id": "<string>",
    "resolved_project_id": "<string>",
    "resolution_summary": "<string>",
    "created_by_actor_name": "<string>",
    "created_by_agent_id": "<string>",
    "created_by_user_id": "<string>",
    "fortress_payload": "<unknown>",
    "external_payload": "<unknown>",
    "response_payload": "<unknown>"
  }
}