Reuse bfcache data during Full prefetches (#88606)
During a Full prefetch (`<Link prefetch={true}>`), check the bfcache for
matching segment data before issuing a new request. The bfcache stores
data from previous navigations, which always includes dynamic data.
This optimization avoids redundant server requests when the user has
already navigated to a route and the data is still fresh according to
the staleTimes.dynamic configuration.
