fix: show final explanation only

Author: mohammedahmed18

codeflash/models/models.py

@@ -343,7 +343,7 @@ class TestsInFile:
     test_type: TestType
 
 
-@dataclass(frozen=True)
+@dataclass
 class OptimizedCandidate:
     source_code: CodeStringsMarkdown
     explanation: str

codeflash/optimization/function_optimizer.py

@@ -1158,7 +1158,7 @@ def find_and_process_best_optimization(
                     original_helper_code,
                     code_context,
                 )
-                self.log_successful_optimization(explanation, generated_tests, exp_type)
+                self.log_successful_optimization(best_optimization.candidate.explanation, generated_tests, exp_type)
         return best_optimization
 
     def process_review(
@@ -1232,7 +1232,8 @@ def process_review(
             file_path=explanation.file_path,
             benchmark_details=explanation.benchmark_details,
         )
-        console.print(Panel(new_explanation_raw_str, title="Best Candidate Explanation", border_style="blue"))
+        best_optimization.candidate.explanation = new_explanation
+
         data = {
             "original_code": original_code_combined,
             "new_code": new_code_combined,