feat(core): Add route hint, make load balancer easier to route querie… #670

Job	Run time
integration	1m 52s
build-x86_64-unknown-linux-gnu	4m 17s
build-aarch64-unknown-linux-gnu	4m 5s
build-aarch64-unknown-linux-musl	4m 35s
build-x86_64-unknown-linux-musl	4m 23s
build-x86_64-pc-windows-msvc	12m 51s
build-x86_64-apple-darwin	7m 15s
build-aarch64-apple-darwin	4m 46s
publish	0s
	44m 4s

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