• Merge pull request #550 from kaitranntt/kai/feat/531-535-cursor-streaming-schema
• fix(cursor): close ReadableStream controller on abort to prevent consumer hangs
• test: use getCcsDir() instead of os.homedir() for test isolation
• fix(cursor): validate fetch status before streaming fallback and register abort early
• feat(cursor): namespace FIELD constants and implement true streaming SSE (#531, #535)