fix(stream): match Command Code CLI transport behavior

src/types.ts

@@ -112,6 +112,8 @@ export interface StreamOptions {
   headers?: Record<string, string>
   fetch?: typeof fetch
   maxTokens?: number
+  temperature?: number
+  sessionId?: string
   /** Resolved pi thinking level; forwarded only through the model's map. */
   reasoning?: string
   onPayload?: (payload: unknown, model: ModelLike) => unknown | Promise<unknown>