RPC endpoint error mapping, span error annotation, and payload validation best practices

const Endpoint = Rpc.make("Endpoint", {
  error: InternalServerError,
  payload: Schema.Struct({
    query: Schema.String.pipe(
      Schema.nonEmptyString({ message: () => "..." }),
      Schema.maxLength(20, { message: () => "..." }),
    ),
  }),
});

class ExampleRpc extends RpcGroup.make(Endpoint) {}

const ExampleRpcGroupLive = ExampleRpc.toLayer({
  "Endpoint": (payload) =>
    Effect.gen(function* () {
      const fallible = yield* Effect.tryPromise(...).pipe(
        Effect.tapErrorCause((error) =>
          Effect.annotateCurrentSpan({ error: error.toJSON() }),
        ),
        Effect.mapError(() => new InternalServerError()),
      );
      return fallible;
    }).pipe(
      Effect.withSpan("@project-name/file/ExampleRpcGroupLive/Endpoint"),
    ),
});