refactor: phase 4 classify network errors + implement retry #87

Job	Run time
Build x86_64-unknown-linux-musl	3m 39s
Build aarch64-unknown-linux-gnu	3m 56s
Build aarch64-apple-darwin	3m 56s
Build x86_64-apple-darwin	3m 39s
Build x86_64-unknown-linux-gnu	3m 19s
Build x86_64-pc-windows-msvc	6m 39s
Build aarch64-pc-windows-msvc	6m 37s
Create Release	11s
	31m 56s

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