docs: Correct test file names and counts to reflect actual implementation

- Update total test count: 581 → 535 tests (532 passed, 3 skipped)
- Correct Task 1: test_security_middleware.py (48 tests)
- Correct Task 3: test_database_service.py (20 tests)
- Correct Task 6: test_page_controller.py (37 tests)
- Correct Task 7: test_background_loader_service.py (46 tests)
- Update Task 2: 50 tests (not 51)
- Update Task 4: 46 tests (not 48)
- Update Task 5: 73 tests (not 59)
- Update Phase 1 total: 118 tests (not 164)
- Update unit tests count: 494 tests (not 540)
- Update git commit count: 16 commits

Files updated:
- TESTING_SUMMARY.md
- docs/instructions.md
- README.md

All tests verified passing with pytest run

tests/integration/test_end_to_end_workflows.py

@@ -6,10 +6,11 @@ without mocking internal implementation details. These tests verify
 that major system flows work correctly end-to-end.
 """
 
-import pytest
 from pathlib import Path
 from unittest.mock import AsyncMock, MagicMock, patch
 
+import pytest
+
 from src.server.services import initialization_service
 
 
@@ -253,7 +254,7 @@ class TestRealWorldScenarios:
     async def test_check_scan_status_with_mock_database(self):
         """Test check scan status with mocked database."""
         from unittest.mock import AsyncMock
-        
+
         # Create a simple check method
         async def check_method(svc, db):
             return True  # Scan completed