hotfix: Optimize Verification Code Handling and Timing Configuration

- Refactor verification code retrieval with dynamic wait time generation
- Use `get_random_wait_time()` for more flexible retry intervals
- Update version to 1.7.04 across project files
- Minor improvements to timing and retry logic in signup process

.github/workflows/build.yml

@@ -6,7 +6,7 @@ on:
       version:
         description: 'Version number (e.g. 1.0.9)'
         required: true
-        default: '1.7.03'
+        default: '1.7.04'
 
 permissions:
   contents: write