chore: fix and extend .gitignore for version files and devlog

Author: polaz

.gitignore

@@ -18,8 +18,13 @@ env/
 
 # Version files generated by hatch-vcs
 coordinode/_version.py
+coordinode/coordinode/_version.py
 langchain-coordinode/langchain_coordinode/_version.py
 llama-index-coordinode/llama_index/graph_stores/coordinode/_version.py
+
+# Local dev / arch docs — not part of the SDK
 GAPS.md
 CLAUDE.md
+DEVLOG*.md
+
 **/.ipynb_checkpoints/