Refactor test scripts into scripts/ directory and improve CI

- Move run_tests_no_ot.sh and run_tests_with_ot.sh to scripts/ directory
- Create scripts/run_tests_with_coverage.py for coverage measurement
- Update CI to use scripts from scripts/ directory
- Eliminate code duplication between shell scripts and CI configuration
- Use Python script with coverage run for proper coverage measurement

scripts/run_tests_with_coverage.py

@@ -0,0 +1,50 @@
+#!/usr/bin/env python3
+"""
+Run tests with OpenTelemetry enabled and coverage measurement.
+This script is designed to be used with 'coverage run' command.
+"""
+
+import os
+import subprocess
+import sys
+
+def main():
+    # Enable OpenTelemetry
+    os.environ['ENABLE_OPENTELEMETRY'] = 'true'
+    os.environ['OTEL_ENABLED'] = 'true'
+    os.environ['OTEL_SERVICE_NAME'] = 'ivatar-test'
+    os.environ['OTEL_ENVIRONMENT'] = 'test'
+    
+    print("Running tests with OpenTelemetry enabled...")
+    print("==========================================")
+    
+    # Test modules to run (including OpenTelemetry-specific tests)
+    test_modules = [
+        'ivatar.ivataraccount.test_auth',
+        'ivatar.ivataraccount.test_views',
+        'ivatar.ivataraccount.test_views_bluesky',
+        'ivatar.test_auxiliary',
+        'ivatar.test_file_security',
+        'ivatar.test_opentelemetry',
+        'ivatar.test_static_pages',
+        'ivatar.test_utils',
+        'ivatar.test_views',
+        'ivatar.test_views_stats',
+        'ivatar.tools.test_views',
+        'ivatar.test_wsgi',
+    ]
+    
+    # Run Django tests
+    cmd = ['python3', 'manage.py', 'test'] + test_modules + ['-v2']
+    
+    try:
+        result = subprocess.run(cmd, check=True)
+        print("")
+        print("Tests completed successfully (OpenTelemetry enabled)")
+        return result.returncode
+    except subprocess.CalledProcessError as e:
+        print(f"Tests failed with exit code {e.returncode}")
+        return e.returncode
+
+if __name__ == '__main__':
+    sys.exit(main())