Vendored flatbuffers improvements (#1812) #313

Job	Run time
identifiers / Build GitHub identifiers	17s
identifiers / Log resolved identifiers	2s
Build wheels on windows-2022 (x86_64)	4m 21s
Build wheels on ubuntu-24.04 (x86_64)	2m 10s
Build wheels on macos-15 (arm64)	2m 21s
	9m 11s

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