Patch Changes

• #7734 f9b0e57 - Fix hydration desync by resolving defaultNotFoundComponent at render time instead of lazily mutating the boundary route's options.notFoundComponent. Route objects are module singletons shared across server requests, so once the server handled any 404, later SSRs of valid URLs wrapped the match in a CatchNotFound boundary the client didn't render, shifting hydration keys and leaving the subtree inert.