Next.js 16.2.0-canary.57: Turbopack SRI Support v16.2.0-canary.57

Turbopack now supports Subresource Integrity, because sometimes you need to verify your bundles didn't get funky on the wire. Also fixed some segment cache edge cases that were lowkey annoying. Shoutout to @mischnic and @ztanner for the heavy lifting on this one.