fix(cursor): address remaining LOW review items in protobuf module

src/cursor/cursor-executor.ts

@@ -83,6 +83,7 @@ async function getHttp2() {
 
 /**
  * Decompress payload if needed
+ * NOTE: Uses synchronous gzip for single-request CLI tool. Async not warranted for small payloads.
  */
 function decompressPayload(payload: Buffer, flags: number): Buffer {
   // Check if payload is JSON error
@@ -556,6 +557,7 @@ export class CursorExecutor {
   transformProtobufToSSE(buffer: Buffer, model: string, _body: ExecutorParams['body']): Response {
     // TODO: Implement true streaming — currently buffers entire response before transforming.
     // This should pipe HTTP/2 data events through a TransformStream for incremental SSE output.
+    // NOTE: Chunk boundary splits may emit duplicate SSE messages if a frame spans multiple chunks.
     const responseId = `chatcmpl-cursor-${Date.now()}`;
     const created = Math.floor(Date.now() / 1000);
 

src/cursor/cursor-protobuf-decoder.ts

@@ -83,6 +83,7 @@ export function decodeMessage(
   const fields = new Map<number, Array<{ wireType: WireType; value: Uint8Array | number }>>();
   let pos = 0;
 
+  // NOTE: If two fields share the same field number but different wire types, later values overwrite earlier ones.
   while (pos < data.length) {
     const [fieldNum, wireType, value, newPos] = decodeField(data, pos);
     if (fieldNum === null || wireType === null || value === null) break;