Refactor: Rename loadHelpers to loadGlobalVariableFunctions with generic pattern

Changes:
- Rename loadHelpers() → loadGlobalVariableFunctions()
- Match pattern of loadGlobalObjects() for consistency
- Load ALL .js files from globalVariables/ directory (not just helpers.js)
- Use filename as key in globalVariableContext (e.g., helpers.js → 'helpers')
- Generic implementation supports multiple function modules

Pattern:
- globalVariables/filename.js → globalVariableContext['filename']
- Each .js file must return an object via IIFE
- Files filtered: *.js (excluding *.example.js)
- Executed in temp context with crypto and console

Benefits:
- Consistent with loadGlobalObjects() pattern
- Generic: can add more function modules without code changes
- Filename determines the global variable name
- Clear separation: .json for data, .js for functions

Example:
- helpers.js → globalVariableContext.helpers
- utils.js → globalVariableContext.utils (future)
- validators.js → globalVariableContext.validators (future)

Testing:
- ✓ Syntax validated
- ✓ helpers.js loads correctly with 11 exports
- ✓ Available in context as 'helpers' object
- ✓ Pattern matches loadGlobalObjects() structure

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/server.js

@@ -69,36 +69,54 @@ function loadGlobalObjects() {
 }
 
 /**
- * Load helpers module using vm.Script and store in globalVariableContext
- * Pattern: helpers.js returns object with utility functions via IIFE
+ * Load all .js files from globalVariables/ directory using vm.Script
+ * Pattern: globalVariables/filename.js -> globalVariableContext['filename']
+ * Each .js file must return an object via IIFE
  */
-function loadHelpers() {
-  const helpersPath = join(__dirname, "globalVariables", "helpers.js");
-  
+function loadGlobalVariableFunctions() {
+  const globalDir = join(__dirname, "globalVariables");
+
   try {
-    const helpersCode = readFileSync(helpersPath, "utf-8");
-    const helpersScript = new vm.Script(helpersCode, { filename: "helpers.js" });
-    
-    // Execute helpers.js in context with crypto and console
-    // Returns object with all helper functions
-    const tempContext = vm.createContext({
-      crypto,
-      console: logger,
-    });
-    const helpers = helpersScript.runInContext(tempContext);
-    
-    // Store in globalVariableContext to be spread into per-request context
-    globalVariableContext.helpers = helpers;
-    
-    logger.info("Loaded helpers module", {
-      functions: Object.keys(helpers).length,
-      exports: Object.keys(helpers),
+    const files = readdirSync(globalDir).filter(
+      (f) => f.endsWith(".js") && !f.endsWith(".example.js"),
+    );
+
+    files.forEach((file) => {
+      const functionName = file.replace(".js", "");
+      const filePath = join(globalDir, file);
+
+      try {
+        const code = readFileSync(filePath, "utf-8");
+        const script = new vm.Script(code, { filename: file });
+
+        // Execute in context with crypto and console
+        // Expects file to return an object via IIFE
+        const tempContext = vm.createContext({
+          crypto,
+          console: logger,
+        });
+        const exportedObject = script.runInContext(tempContext);
+
+        globalVariableContext[functionName] = exportedObject;
+        logger.info(`Loaded global function module: ${functionName}`, {
+          file: file,
+          exports: Object.keys(exportedObject || {}).length,
+        });
+      } catch (error) {
+        logger.error(`Failed to load global function module from ${file}`, {
+          error: error.message,
+        });
+        throw error;
+      }
     });
+
+    logger.info(
+      `Loaded ${files.length} global function modules from ${globalDir}`,
+    );
   } catch (error) {
-    logger.error("Failed to load helpers module", {
-      path: helpersPath,
+    logger.error("Failed to load global function modules", {
+      directory: globalDir,
       error: error.message,
-      stack: error.stack,
     });
     throw error;
   }
@@ -158,8 +176,8 @@ async function startServer() {
     // Load global objects from globalVariables/ directory (e.g., service account keys)
     loadGlobalObjects();
 
-    // Load helpers module via vm.Script and add to globalVariableContext
-    loadHelpers();
+    // Load global function modules from globalVariables/ directory (e.g., helpers.js)
+    loadGlobalVariableFunctions();
 
     logger.info("Starting Proxy Script Server...");
     logger.info(