security: fix vulnerabilities and harden code (2026-03-12)

Path traversal fixes:
- DeleteFile.js: use path.resolve() + symlink protection (CRITICAL)
- DeleteFileFolder.js: add path.resolve() validation + symlink check (CRITICAL)
- RenameFile.js: use path.resolve() with proper prefix check + symlink guard (HIGH)
- attachments.js: add baseDir validation + skip symlinks in recursive search (MEDIUM)

XSS fixes:
- dashboard.js: escape user input in onerror/onclick inline attributes (HIGH)
- paramadminsettingsetup.script.js: escape values in innerHTML template (MEDIUM)

Input validation:
- inputValidationMiddleware.js: block suspicious requests instead of logging only (MEDIUM)

Version bump: 1.2.2-beta → 1.2.3-beta

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@cdn-app/insider-myaxrin-labs-dinawo",
-  "version": "1.2.2-beta",
+  "version": "1.2.3-beta",
   "description": "",
   "main": "server.js",
   "scripts": {