DRAFT: Demonstrating fallible index traits #6820

Job	Run time
build (no git)	1m 32s
check (protos)	49s
check (rustfmt)	20s
nix flake (macos-14)	9m 2s
nix flake (ubuntu-24.04-arm)	7m 16s
nix flake (ubuntu-24.04)	7m 50s
test (linux-aarch64-gnu)	6m 3s
test (linux-x86_64-gnu)	6m 18s
test (macos-x86_64)	8m 26s
check (clippy)	1m 32s
test (windows-x86_64)	14m 56s
test (windows-aarch64)	16m 4s
test (macos-aarch64)	5m 17s
check (doctests)	3m 6s
check (zizmor)	35s
check (latest mkdocs, optional)	8m 1s
check (mkdocs)	18s
check (Cargo.lock dependency count)	4s
check (codespell)	13s
check (cargo-deny, licenses)	29s
check (cargo-deny, bans)	32s
check (cargo-deny, advisories)	26s
check (cargo-deny, sources)	23s
required checks (merge queue)	0s
	1h 39m 32s

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