chore(router): Update to axum 0.8 #3819

Job	Run time
rustfmt	12s
deny	10s
clippy	1m 21s
check (ubuntu-latest)	2m 35s
codegen	15s
check (macOS-latest)	3m 16s
check (windows-latest)	5m 36s
external-types	32s
Interop Tests (ubuntu-latest)	18s
msrv	20s
semver	1m 14s
Interop Tests (macOS-latest)	32s
test (ubuntu-latest)	2m 48s
Interop Tests (windows-latest)	3m 25s
test (macOS-latest)	2m 40s
udeps	4m 7s
test (windows-latest)	7m 11s
	36m 32s

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