perf: Switch CV parsing and company matching to Claude Haiku

- CVParserService: Sonnet 4 → Haiku (MaxTokens 4096 → 2048)
- AICompanyNameMatcherService: Sonnet 4 → Haiku (MaxTokens 1024 → 512)
- Estimated cost savings: ~60% per CV check
- Haiku handles structured extraction and semantic matching effectively

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

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

src/RealCV.Infrastructure/Services/AICompanyNameMatcherService.cs

@@ -128,8 +128,8 @@ public sealed class AICompanyNameMatcherService : ICompanyNameMatcherService
 
             var parameters = new MessageParameters
             {
-                Model = "claude-sonnet-4-20250514",
+                Model = "claude-3-5-haiku-20241022",
-                MaxTokens = 1024,
+                MaxTokens = 512,
                 Messages = messages,
                 System = [new SystemMessage(SystemPrompt)]
             };

src/RealCV.Infrastructure/Services/CVParserService.cs

@@ -171,8 +171,8 @@ public sealed class CVParserService : ICVParserService
 
         var parameters = new MessageParameters
         {
-            Model = "claude-sonnet-4-20250514",
+            Model = "claude-3-5-haiku-20241022",
-            MaxTokens = 4096,
+            MaxTokens = 2048,
             Messages = messages,
             System = [new SystemMessage(SystemPrompt)]
         };