Update .gitignore for package rename

- Add .claude/ (Claude Code config)
- Update paths from agentserver/ to xml_pipeline/

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -13,8 +13,8 @@ ENV/
 .env
 .env.local
 .env.*.local
-agentserver/config/organism_identity/private.pem
-agentserver/config/*.signed.xml
+xml_pipeline/config/organism_identity/private.pem
+xml_pipeline/config/*.signed.xml
 
 # IDE
 .idea/
@@ -22,6 +22,9 @@ agentserver/config/*.signed.xml
 *.swp
 *.swo
 
+# Claude Code
+.claude/
+
 # OS
 Thumbs.db
 .DS_Store