refactor: rename Batch to Partition in error handling and processing functions for consistency

internal/app/custom_errors/loader.error.go

@@ -21,9 +21,9 @@ func LoaderErrorHandler(
 	ctx context.Context,
 	maxRetryAttempts int,
 	chErrorsIn <-chan LoaderError,
-	chChunksOut chan<- models.Batch,
+	chBatchesOut chan<- models.Batch,
 	chJobErrorsOut chan<- JobError,
-	wgActiveChunks *sync.WaitGroup,
+	wgActiveBatches *sync.WaitGroup,
 ) {
 	for {
 		if ctx.Err() != nil {
@@ -42,7 +42,7 @@ func LoaderErrorHandler(
 			if err.RetryCounter >= maxRetryAttempts {
 				jobError := JobError{
 					ShouldCancelJob: false,
-					Msg:             fmt.Sprintf("chunk %v reached max retries (%d)", err.Id, maxRetryAttempts),
+					Msg:             fmt.Sprintf("Batch %v reached max retries (%d)", err.Id, maxRetryAttempts),
 					Prev:            &err,
 				}
 
@@ -52,14 +52,14 @@ func LoaderErrorHandler(
 					return
 				}
 
-				wgActiveChunks.Done()
+				wgActiveBatches.Done()
 				continue
 			}
 
 			err.RetryCounter++
 
 			select {
-			case chChunksOut <- err.Batch:
+			case chBatchesOut <- err.Batch:
 			case <-ctx.Done():
 				return
 			}