* feat: update to Go 1.26
replace deprecated httputil.NewSingleHostReverseProxy (Director)
with ReverseProxy.Rewrite, switch math/rand to math/rand/v2 in
production code, update Dockerfile base image.
* fix test to accept response with HTTP status of 307 and 308 where 302 and 301 are expected
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Co-authored-by: Andrew Gillis <11790789+gammazero@users.noreply.github.com>