Add UK education verification and security fixes

Features:
- Add UK institution recognition (170+ universities)
- Add diploma mill detection (100+ blacklisted institutions)
- Add education verification service with date plausibility checks
- Add local file storage option (no Azure required)
- Add default admin user seeding on startup
- Enhance Serilog logging with file output

Security fixes:
- Fix path traversal vulnerability in LocalFileStorageService
- Fix open redirect in login endpoint (use LocalRedirect)
- Fix password validation message (12 chars, not 6)
- Fix login to use HTTP POST endpoint (avoid Blazor cookie issues)

Code improvements:
- Add CancellationToken propagation to CV parser
- Add shared helpers (JsonDefaults, DateHelpers, ScoreThresholds)
- Add IUserContextService for user ID extraction
- Parallelized company verification in ProcessCVCheckJob
- Add 28 unit tests for education verification

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/TrueCV.Web/Components/Pages/Report.razor

@@ -5,6 +5,7 @@
 @inject ICVCheckService CVCheckService
 @inject NavigationManager NavigationManager
 @inject AuthenticationStateProvider AuthenticationStateProvider
+@inject ILogger<Report> Logger
 
 <PageTitle>Verification Report - TrueCV</PageTitle>
 
@@ -509,7 +510,8 @@
         }
         catch (Exception ex)
         {
-            _errorMessage = $"An error occurred: {ex.Message}";
+            Logger.LogError(ex, "Error loading report data");
+            _errorMessage = "An error occurred while loading the report. Please try again.";
         }
         finally
         {