fix : COR-Matrix integration (#203)

* fix: Remove fileDiff assignment in ToolExecutor class and moved to catch 

---------

Co-authored-by: Magesh <mageshmscss@gmail.com>

Author: magesh-presidio

src/core/task/ToolExecutor.ts

@@ -809,15 +809,14 @@ export class ToolExecutor {
 
 						await this.saveCheckpoint()
 
-						fileDiff = undefined
-
 						break
 					}
 				} catch (error) {
 					await this.handleError("writing file", error, block)
 					await this.diffViewProvider.revertChanges()
 					await this.diffViewProvider.reset()
 					await this.saveCheckpoint()
+					fileDiff = undefined
 					break
 				} finally {
 					if (fileDiff) {