Batch RPC throws on first error, losing successful results

Problem

If any item in a batch fails, the entire batch throws. This loses successful results.

Location

src/protocol/rpc.ts:157-163

Current Code

return results.map((r) => {
  if (r.error) {
    throw new RPCRequestError(...);  // Throws on first error
  }
  return r.result;
}) as T;

Recommendation

• Return Result<T, Error> type for each item
• Or provide separate method for "all or nothing" vs "collect results"
• Document behavior clearly

Priority

High - Data loss in partial failure scenarios

Start by reading the batch RPC handling in src/protocol/rpc.ts:157-163 and trace how individual results and errors are represented. Decide whether batch calls should return per-item Result values or expose separate partial-success and all-or-nothing behavior. Done means successful results are no longer lost on partial failure and the behavior is documented clearly.