* fix: improve buffer handling
* tests:add tests for StdioRequestReader
- Introduced a new private method `_read_async` to handle asynchronous reading from stdin.
- Updated `_read_stream` to utilize the new `_read_async` method for improved code clarity and maintainability.
- Added a new test file `test_stdio.py` to validate the functionality of the StdioRequestReader, ensuring correct handling of input data streams.
* fix: remove useless code
* fix: handle empty lines in StdioRequestReader
- Updated the StdioRequestReader to strip and skip empty lines during input processing.
- Added a new test to validate the handling of empty lines, ensuring the reader correctly processes a stream with mixed content.
* apply ruff
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Co-authored-by: Yeuoly <admin@srmxy.cn>