Repository navigation

Add a completeness fence over the GraphQL mutation surface #1265

Job	Run time
Docker build smoke test	8m 24s
test (windows, non-blocking)	1m 51s
build --release	3m 34s
test (stable)	5m 7s
MSRV (Rust 1.91)	44s
test (beta)	7m 2s
release tag validation	3s
gitlawb-core dependency purity	13s
release versioning coverage	17s
fmt + clippy	2m 34s
cargo audit	16s
	30m 5s