better explanations for ee files (#7519)

.claude/settings.json

@@ -56,7 +56,10 @@
       "Bash(git checkout:*)",
       "Bash(git merge:*)",
       "Bash(git rebase:*)"
-    ]
+    ],
+    "additionalDirectories": [
+      "../windmill-ee-private/"
+    ]  
   },
   "enableAllProjectMcpServers": true
 }

backend/CLAUDE.md

@@ -5,6 +5,7 @@
 - Follow @rust-best-practices.mdc for detailed guidelines
 - Database schema reference: @summarized_schema.txt
 - The API routes prefixes are all listed in windmill-api/src/lib.rs
+- This repository is the open source side of the project. The enterprise files (\*\_ee.rs) are in the `windmill-ee-private` folder (a sibling directory). Those files are symlinked into their corresponding locations within each crate's `src/` directory.
 
 ## Adding New Features