next.js

16760877 - fix(experimental.lockDistDir): Acquire the lock in dev earlier (#85116)

fix(experimental.lockDistDir): Acquire the lock in dev earlier (#85116) Apparently I grabbed the lock too late, which led to the second process still managing the `distDir` before exiting... https://vercel.slack.com/archives/C03EWR7LGEN/p1760910025067089 This moves the acquisition earlier for dev, and extends the e2e test to cover this. [Screen Recording 2025-10-20 at 10.42.49 AM.webm <span class="graphite__hidden">(uploaded via Graphite)</span> <img class="graphite__hidden" src="https://app.graphite.dev/user-attachments/thumbnails/68785bda-1dd5-437a-bf16-54de2d54a49c.webm" />](https://app.graphite.dev/user-attachments/video/68785bda-1dd5-437a-bf16-54de2d54a49c.webm)