### Why?
Async Request API codemods can leave temporary casts that still require
application-specific repairs. Those locations need explicit markers,
while optional feature adoption needs to be distinguishable from
required version migrations.
### How?
Add `@next-codemod-error` comments to temporary `UnsafeUnwrapped*`
casts, with instructions for completing the repair. Preserve documented
ignores and avoid duplicating casts or markers when the transform runs
again. Mark generated Cache Components opt-outs with
`@next-codemod-ignore`, a removal condition and a link to the adoption
guide.
Add `upgrade --skip-adoption` to skip the Cache Components `instant =
false` transform and partial-prefetch adoption cleanup. Required
migrations and normal dependency and bundler selection keep their
existing behavior. Both adoption transforms can still be run explicitly.
Jiwon Choi