Simplify error message in form-edit pipeline

Remove prescriptive collapse: false instruction from file modification error message, making it more general and user-friendly.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: Bruce Hauman

src/clojure_mcp/tools/form_edit/pipeline.clj

@@ -144,7 +144,7 @@
                    (file-timestamps/file-modified-since-read? nrepl-client-atom file-path)))
         {::error true
          ::message (str "File has been modified since last read: " file-path
-                        "\nPlease read the WHOLE file again with `collapse: false` before editing.")}
+                        "\nPlease read the file again before editing.")}
         ctx))))
 
 (defn lint-code