fix: stage files before checking for changes

Previously git diff checked unstaged changes, so new untracked files
(like the new Abstimmungen/ directory) would not trigger a commit.
Now stages first, then checks the staged diff.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

crawler.py

@@ -155,11 +155,11 @@ def main():
     if args.no_git:
         return
 
-    if repo.git.diff(name_only=True) == "":
+    repo.git.add("*")
+    if repo.git.diff("--cached", name_only=True) == "":
         return
 
     message = generate_commit_message(old_bios, bios)
-    repo.git.add("*")
     repo.index.commit(message)
     origin = repo.remote(name="origin")
     origin.push()