Serve static-files so deployed-version info (VERSION_D) is reachable (#813)

The static-page module and sourceversion.py/docker.yml were already present
on this branch, but `src/static-files` was not registered as a build asset,
so the CI-generated src/static-files/VERSION_D.html was never deployed and
`/static/VERSION_D` returned nothing. Add `src/static-files` to angular.json
assets to match dtq-dev, making the deployed-commit info reachable.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: Matus Kasak

angular.json

@@ -40,6 +40,7 @@
             "aot": true,
             "assets": [
               "src/assets",
+              "src/static-files",
               "src/robots.txt"
             ],
             "styles": [