* upgrade to .NET 9.0 @ c# #264

Job	Run time
runs-on (macos-latest) / ReSharper	1m 55s
runs-on (macos-latest) / build (crawler)	1m 1s
runs-on (ubuntu-latest) / ReSharper	1m 53s
runs-on (macos-latest) / build (imagePipeline)	39s
runs-on (ubuntu-latest) / build (crawler)	46s
runs-on (windows-latest) / build (crawler)	2m 24s
runs-on (macos-latest) / build (shared)	38s
runs-on (ubuntu-latest) / build (imagePipeline)	36s
runs-on (windows-latest) / ReSharper	5m 21s
runs-on (windows-latest) / build (imagePipeline)	2m 8s
runs-on (ubuntu-latest) / build (shared)	32s
runs-on (macos-latest) / build (tbClient)	33s
runs-on (windows-latest) / build (shared)	1m 48s
runs-on (ubuntu-latest) / build (tbClient)	34s
runs-on (windows-latest) / build (tbClient)	1m 9s
	21m 57s

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