fix: address remaining review findings (interface assertions, DismissReview ctx, import order, filepath param, spelling)

vcs/util.go

@@ -37,7 +37,7 @@ func GetAllFilesInPath(ctx context.Context, client FileReader, owner, repo, path
 	var walk func(string) error
 	walk = func(dir string) error {
 		if err := ctx.Err(); err != nil {
-			return fmt.Errorf("context cancelled during traversal: %w", err)
+			return fmt.Errorf("context canceled during traversal: %w", err)
 		}
 
 		entries, err := client.ListContents(ctx, owner, repo, dir)
@@ -47,7 +47,7 @@ func GetAllFilesInPath(ctx context.Context, client FileReader, owner, repo, path
 
 		for _, entry := range entries {
 			if err := ctx.Err(); err != nil {
-				return fmt.Errorf("context cancelled during traversal: %w", err)
+				return fmt.Errorf("context canceled during traversal: %w", err)
 			}
 
 			switch entry.Type {