Fix naming conflict in ReceiptAutoMapResult

Renamed static factory method from 'MultipleMatches' to
'WithMultipleMatches' to avoid conflict with the 'MultipleMatches'
property in the same class.

This resolves the compilation error: "The type 'ReceiptAutoMapResult'
already contains a definition for 'MultipleMatches'".

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

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

.claude/settings.local.json

@@ -7,7 +7,8 @@
       "Bash(dotnet build)",
       "Bash(dotnet ef database:*)",
       "Bash(dotnet ef migrations:*)",
-      "Bash(git reset:*)"
+      "Bash(git reset:*)",
+      "Bash(already contains a definition for 'MultipleMatches'\".\n\n🤖 Generated with [Claude Code](https://claude.com/claude-code)\n\nCo-Authored-By: Claude <noreply@anthropic.com>\nEOF\n)\")"
     ],
     "deny": [],
     "ask": []