chore(router): Update to axum 0.8 #3744

Job	Run time
rustfmt	13s
cargo-deny check	21s
check-external-types	1m 4s
check (ubuntu-latest)	2m 17s
clippy	55s
check (macOS-latest)	2m 48s
check (windows-latest)	4m 11s
Interop Tests (ubuntu-latest)	49s
Interop Tests (macOS-latest)	1m 4s
Check MSRV	1m 2s
semver	1m 8s
Interop Tests (windows-latest)	3m 0s
test (ubuntu-latest)	2m 56s
test (macOS-latest)	2m 29s
codegen	26s
test (windows-latest)	7m 36s
Check unused dependencies	3m 50s
	36m 9s

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