feat(unftp-sbe): add derives for `OpendalMetadata` #6802

Job	Run time
build-c-doc	17s
build-java-doc	23s
build-nodejs-doc	20s
build-python-doc	2m 35s
build-rust-doc	4m 25s
build-cpp-doc	59s
build-dav-server-opendalfs-doc	41s
build-fuse3-opendal-doc	49s
build-haskell-doc	9m 50s
build-lua-doc	10s
build-object-store-opendal-doc	48s
build-ocaml-doc	4m 37s
build-unftp-sbe-opendal-doc	1m 23s
build-virtiofs-opendal-doc	27s
build-website	7m 24s
	35m 8s

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