Merge pull request #25130 from stefanobaghino/scope-git-hygiene-hook

agents: scope git hygiene hook to `git add` commands

.agents/settings.json

@@ -16,6 +16,7 @@
         "hooks": [
           {
             "type": "command",
+            "if": "Bash(git add *)",
             "command": "bash .agents/hooks/enforce-git-hygiene.sh"
           }
         ],