v2.9.0

• Added a ClickHouse output plugin with configurable field mapping, endpoint failover, and a schema helper script.
• Added an Overview output plugin that reports received IPFIX fields and their frequencies as JSON.
• Added support for reading fdsdump filters from standard input using -F -.
• Fixed a potential buffer overflow in the TCP input’s LZ4 decoder.
• Fixed a potential buffer overflow in the Forwarder output plugin.
• Fixed repeated template transmission over TCP in the Forwarder output plugin.
• Fixed stalled Forwarder transfers when no new input arrives and cleared pending buffers on connection loss.
• Fixed a memory leak involving periodic messages during plugin destruction.
• Fixed missing includes affecting builds on some platforms, including FreeBSD.