fix(sync): exclude soft-deleted books from file sync #85

Job	Run time
build (windows-latest, x86_64-pc-windows-msvc)	6m 19s
build (macos-latest, --target x86_64-apple-darwin, x86_64-apple-darwin)	4m 39s
build (ubuntu-22.04, x86_64-unknown-linux-gnu)	6m 51s
build (macos-latest, --target aarch64-apple-darwin, aarch64-apple-darwin)	5m 50s
build-android	18m 54s
create-updater-json	8s
	42m 41s

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