refactor: improve tracing of blob cache by passing span to task (#32) #156

Job	Run time
rust-library-base / Base Checks / Rustfmt	17s
rust-library-base / Base Checks / doctest	1m 17s
rust-library-base / Base Checks / Docs	46s
rust-library-base / Base Checks / Clippy	57s
rust-library-base / Base Checks / Test Suite	2m 10s
rust-library-base / Feature Checks	39s
	6m 6s

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