fix(CursorResponse): enhance id getter to handle missing cursor id

- Updated the id getter to throw an error if the cursor id is missing, ensuring more robust error handling.
- Adjusted the retrieval of cursor id to return 0 when it is null, improving the reliability of cursor operations.
- This change aims to enhance the accuracy of responses by enforcing the presence of a valid cursor id.

Author: italojs

src/cmap/wire_protocol/responses.ts

@@ -247,16 +247,13 @@ export class CursorResponse extends MongoDBResponse {
   }
 
   public get id(): Long {
+    if (!this.cursor.has('id')) {
+      throw new MongoUnexpectedServerResponseError('"id" is missing');
+    }
     try {
-      if (!this.cursor.has('id')) {
-        throw new MongoUnexpectedServerResponseError('"id" is missing');
-      }
       const cursorId = this.cursor.get('id', BSONType.long, false);
       return cursorId != null ? Long.fromBigInt(cursorId) : Long.fromBigInt(0n);
     } catch (cause) {
-      if (cause instanceof MongoUnexpectedServerResponseError) {
-        throw cause;
-      }
       throw new MongoUnexpectedServerResponseError(cause.message, { cause });
     }
   }