(improvement)Optimize DCAware/RackAware/TokenAware RoundRobinPolicy with host distance caching#651

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mykaul wants to merge 6 commits intoscylladb:masterfrom

mykaul:query_plan_opt_2

Commits on Jan 23, 2026

Commits on Jan 24, 2026

(improvement)Optimize RackAwareRoundRobinPolicy by caching some host distances
mykaul
committed

Commits on Jan 25, 2026

(improvement)TokenAware round robin policy and others - improved query planning.
mykaul
committed
(improvement) Further optimize load-balancing query plans and tests
mykaul
committed
(improvement) additional improvements to HostFilter and default policy.
mykaul
committed