internal/pkg: consolidate cache attributes

This makes the interface stable.

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

internal/pkg/exec.go

@@ -649,8 +649,8 @@ func (c *Cache) EnterExec(
 	var z *container.Container
 	z, err = e.makeContainer(
 		ctx, c.msg,
-		c.flags,
-		c.jobs,
+		c.attr.Flags,
+		c.attr.Jobs,
 		hostNet,
 		temp, work,
 		func(a Artifact) (*check.Absolute, unique.Handle[Checksum]) {
@@ -693,7 +693,7 @@ func (a *execArtifact) cure(f *FContext, hostNet bool) (err error) {
 	msg := f.GetMessage()
 	var z *container.Container
 	if z, err = a.makeContainer(
-		ctx, msg, f.cache.flags, f.GetJobs(), hostNet,
+		ctx, msg, f.cache.attr.Flags, f.GetJobs(), hostNet,
 		f.GetTempDir(), f.GetWorkDir(),
 		f.GetArtifact,
 		f.cache.Ident,