chore: Add .secrets and datajoint.json to gitignore

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: dimitri-yatsenko

.gitignore

@@ -188,3 +188,7 @@ dj_local_conf.json
 # pixi environments
 .pixi
 _content/
+
+# Local config
+.secrets/
+datajoint.json