DRAFT: Demonstrating fallible index traits #6815

Job	Run time
check (rustfmt)	22s
nix flake (macos-14)	11m 49s
nix flake (ubuntu-24.04-arm)	7m 31s
build (no git)	1m 30s
nix flake (ubuntu-24.04)	7m 30s
check (protos)	51s
test (linux-x86_64-gnu)	6m 4s
check (clippy)	1m 29s
test (linux-aarch64-gnu)	5m 37s
check (codespell)	12s
test (windows-x86_64)	14m 16s
test (windows-aarch64)	15m 24s
test (macos-aarch64)	6m 8s
check (Cargo.lock dependency count)	5s
check (doctests)	3m 3s
check (mkdocs)	17s
check (zizmor)	31s
test (macos-x86_64)	7m 58s
check (cargo-deny, licenses)	27s
check (cargo-deny, bans)	26s
check (cargo-deny, advisories)	30s
check (latest mkdocs, optional)	7m 15s
check (cargo-deny, sources)	24s
required checks (merge queue)	0s
	1h 39m 39s

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