feat: Improve company alias matching and add batch tester flags display

- Add Deliveroo alias (ROOFOODS LTD) to fix matching to wrong company
- Add JCB alias (J.C. BAMFORD EXCAVATORS LIMITED)
- Improve FindDirectAliasMatch to prefer active companies over dissolved
- Display verification flags in CVBatchTester output
- Employer verification improved from 65% to 86%

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

tools/CVBatchTester/Program.cs

@@ -198,6 +198,16 @@ class Program
 
                             if (!string.IsNullOrEmpty(result.VerificationNotes))
                                 Log($"    Note: {result.VerificationNotes}");
+
+                            // Display any flags (warnings/issues)
+                            if (result.Flags?.Count > 0)
+                            {
+                                foreach (var flag in result.Flags)
+                                {
+                                    var flagIcon = flag.Severity == "Critical" ? "⚠️" : "ℹ️";
+                                    Log($"    {flagIcon} FLAG [{flag.Type}]: {flag.Message}");
+                                }
+                            }
                         }
                         catch (Exception ex)
                         {