[Cherry-pick to release/v0.5.12] [Fix] DSV4 cached_loc invalidated when SWA mapping is rebuilt (#25889) - #26079

[Cherry-pick to release/v0.5.12] [Fix] DSV4 cached_loc invalidated when SWA mapping is rebuilt (#25889)#26079

Kangyan-Zhou merged 1 commit into

release/v0.5.12sgl-project/sglang:release/v0.5.12from

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