Future-proofed "cache override"#659
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The existing cache override hostcalls didn't support adding additional fields; in this case, a field to bound how long the request spends waiting for request collapsing to complete. Add a v3 "set cache override" hostcall, structured so as to allow future extensibility. Add the new lookup_timeout value as well. (Since Viceroy doesn't implement HTTP caching today, the override acts as a no-op.)
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The existing cache override hostcalls didn't support adding additional fields; in this case, a field to bound how long the request spends waiting for request collapsing to complete.
Add a v3 "set cache override" hostcall, structured so as to allow future extensibility. Add the new lookup-timeout value as well. (Since Viceroy doesn't implement HTTP caching today, the override is a no-op.)