Add Python cache files to .gitignore

- Added __pycache__/ directories
- Added *.py[cod] and *.class files
- Removed tests/integration/__pycache__/ specific entry (now covered by general rule)

.gitignore

@@ -82,4 +82,10 @@ npm-package/package-lock.json
 .beads/beads.db?*
 bd-original
 mcp_agent_mail/
-tests/integration/__pycache__/
+
+# Python cache files
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python