internal/pkg: pass context to file cure

This removes the left over embedded contexts.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/pkg/pkg.go

@@ -265,7 +265,7 @@ type File interface {
 	// Callers must not modify the returned byte slice.
 	//
 	// Result must remain identical across multiple invocations.
-	Cure() ([]byte, error)
+	Cure(ctx context.Context) ([]byte, error)
 
 	Artifact
 }
@@ -726,7 +726,7 @@ func (c *Cache) openFile(f File) (r io.ReadCloser, err error) {
 			return
 		}
 		var data []byte
-		if data, err = f.Cure(); err != nil {
+		if data, err = f.Cure(c.ctx); err != nil {
 			return
 		}
 		r = io.NopCloser(bytes.NewReader(data))
@@ -931,7 +931,7 @@ func (c *Cache) Cure(a Artifact) (
 		}
 
 		var data []byte
-		data, err = f.Cure()
+		data, err = f.Cure(c.ctx)
 		if err != nil {
 			return
 		}