NanoNNG 0.21.8

What's Changed

• Introduce the blf library. by @xinyi-xs in #863
• Support checking the parquet path at startup to see if there are any old parquet files by @RanMaoyi in #877
• First version of blf library. by @xinyi-xs in #878
• [nanonng] eliminate code warnings by @RanMaoyi in #876
• • FIX [parquet] file_path UAF error by @RanMaoyi in #881
• • FIX [core/socket] fix CVE-2024-25767 by @JaylinYu in #880
• • FIX [core/socket] fix CVE-2024-25767 by @JaylinYu in #882
• exchange_server supports dynamically modifying the fullOp of the ringbus in sock_recv by @RanMaoyi in #883
• Exchange && ringbuffer support blf. by @xinyi-xs in #879
• FIx #884 by @JaylinYu in #885
• [exchange_server] Remove send messages queue, and send message directly by @RanMaoyi in #886
• [WIP] Add new unit tests for quic stream layer. by @wanghaEMQ in #888
• fix session keeping feature by @JaylinYu in #891
• Sync transport & protocol layer changes that related to ping&qos by @wanghaEMQ in #897
• Fix serval leaks by @wanghaEMQ in #898
• • MDF [transport/mqtt] remove useless msg free & modify log level by @JaylinYu in #900
• Sync with upstream nng for next release by @JaylinYu in #901

Full Changelog: 0.21.6...0.21.8