Fix security check and remove obsolete tests

- Update security check to ignore environment variable references
- Remove tests for Lambda and DynamoDB that no longer exist
- Update tests to check for API service usage
- Fix Amplify build failure

scripts/security/security-check.js

@@ -33,7 +33,12 @@ function scanFile(filePath) {
     if (matches) {
       matches.forEach(match => {
         // Only flag if it's not a placeholder or example
-        if (!match.includes('example') && !match.includes('YOUR_') && !match.includes('xxx')) {
+        if (!match.includes('example') && 
+            !match.includes('YOUR_') && 
+            !match.includes('xxx') &&
+            !match.includes('your-password') &&
+            !match.includes('process.env') &&
+            !match.includes('<set-in-environment>')) {
           issues.push({
             file: filePath,
             pattern: pattern.source,