Copy an agent as a fresh draft

Copies an agent of any status into a NEW draft named "<source name> (Copy)" (status: initializing, nothing billed). A draft source copies losslessly. A source that was started before configs were snapshotted is rebuilt from its live record, and every field that could not be recovered is listed in lossyFields — set those with PATCH before you activate the copy. This is also how you restart a paused agent, since activate only accepts drafts. The copy counts towards the free plan's 10-agent cap (403 AGENT_LIMIT_REACHED). Answers 201 with the new draft in the same shape as GET; activate it with POST /business/agents/{agentId}/activate using the returned id.

Errors:

• 404 AGENT_NOT_FOUND — No agent with this id belongs to the token owner. A deleted agent and another user's agent answer identically.
• 403 AGENT_LIMIT_REACHED — Free-plan accounts may hold at most 10 agents, drafts included. Delete an agent or upgrade the plan.
• 422 VALIDATION_FAILED — The request failed this endpoint's own validation — param names the offending field and message says why.
• 429 RATE_LIMITED — The agents bucket is exhausted: 30 requests per minute or 2,000 per day per token owner, shared by every /business/agents operation (a 429 raised by the agents service is relayed with this code too). Retry after the Retry-After header.
• 500 UNEXPECTED_ERROR — The agents service failed (5xx, refused service credential, or a timeout after 60s) or the rate limiter was unavailable. Retry later; quote request_id to support.

Requires one of the following token scopes: agents.