chore(gitignore): track CHANGELOG.md explicitly

The blanket *.md ignore was hiding CHANGELOG.md, forcing 'git add -f' on
every update. Allow-list it so the file lives under normal git tracking.
CLAUDE.md stays local (user keeps it personal until a dedicated repo).

.gitignore

@@ -71,7 +71,8 @@ logs/*
 # Documentation folder
 docs/
 
-# .md files
+# .md files (project-level Markdown is brol-y; allow-list the ones we track)
 *.md
+!CHANGELOG.md
 
 #