Repository navigation

feat(storage): storage-agnostic BlobStore layer + push-latency quick wins #720

Job	Run time
MSRV (Rust 1.91)	41s
Docker build smoke test	7m 53s
cargo audit	24s
fmt + clippy	42s
build --release	4m 17s
gitlawb-core dependency purity	12s
test (windows, non-blocking)	1m 46s
test (beta)	2m 11s
test (stable)	2m 23s
	20m 29s