chore(ci): improving CI reliability when caching (#11501)

This fixes a case where potentially some static files get not properly
treated as inputs in the hash for nx cache calculation.

Also it fixes a problem where the assets.mdx get sorted randomly each
generation.

Factors in some overlap from
https://github.com/zitadel/zitadel/pull/11447

---------

Co-authored-by: Copilot <[email protected]>

.github/workflows/lint_test_build.yml

@@ -68,6 +68,8 @@ jobs:
           NX_DAEMON: "false"
           NX_DISABLE_DB: "true"
         run: pnpm nx affected --nxBail --targets lint test build --exclude @zitadel/docs
+      - name: Check for uncommitted changes (Codegen mismatch)
+        run: git diff --exit-code
       - name: Suggest Pipeline Fix By Nx Cloud AI
         if: failure() || cancelled()
         env: