feat: refactor models to improve type handling and enhance error management across migration processes

cmd/go_migrate/loader-error-handler.go

@@ -4,10 +4,13 @@ import (
 	"context"
 	"fmt"
 	"sync"
+
+	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/custom_errors"
+	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/models"
 )
 
 type LoaderError struct {
-	Chunk
+	models.Chunk
 	Msg string
 }
 
@@ -18,8 +21,8 @@ func (e *LoaderError) Error() string {
 func loaderErrorHandler(
 	ctx context.Context,
 	chErrorsIn <-chan LoaderError,
-	chChunksOut chan<- Chunk,
-	chJobErrorsOut chan<- JobError,
+	chChunksOut chan<- models.Chunk,
+	chJobErrorsOut chan<- custom_errors.JobError,
 	wgActiveChunks *sync.WaitGroup,
 ) {
 	for {
@@ -37,7 +40,7 @@ func loaderErrorHandler(
 			}
 
 			if err.RetryCounter >= maxRetryAttempts {
-				jobError := JobError{
+				jobError := custom_errors.JobError{
 					ShouldCancelJob: false,
 					Msg:             fmt.Sprintf("chunk %v reached max retries (%d)", err.Id, maxRetryAttempts),
 					Prev:            &err,