Some struct tweaks in ConcurrencyTools + syft/stereoscope debugging

[Noxsios]

Description

...

Related Issue

Fixes #

Relates to #

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Other (security config, docs update, etc)

Checklist before merging

• Test, docs, adr added or updated as needed
• Contributor Guide Steps followed

[Noxsios]

the offending line https://github.com/anchore/stereoscope/blob/cd49355d934e9e09339e0b690398afe7bd9f63f1/pkg/image/layer.go#L119

I think its caused by too much IO

[Noxsios]

might be this anchore/stereoscope#132

or anchore/stereoscope#161

[Noxsios]

doing a syftImage.Cleanup() results in:

     ERROR:  Failed to create package: unable to create an SBOM catalog for the package: failed to read
 layer="sha256:7dbfe3d6ab90114ecc841a63aab20ecf14f47e5cf2369db5eba7e2db89226631" tar : open
 /home/runner/.zarf-cache/images/sha256:7dbfe3d6ab90114ecc841a63aab20ecf14f47e5cf2369db5eba7e2db89226631.tar:
 no such file or directory

[Noxsios]

how to see syft logs:

	eventBus := partybus.NewBus()
	stereoscope.SetBus(eventBus)
	syft.SetBus(eventBus)
	subscription := eventBus.Subscribe()
	defer eventBus.Unsubscribe(subscription)

	cfg := logrus.Config{
		Level: logger.DebugLevel,
	}
	log, _ := logrus.New(cfg)
	syft.SetLogger(log)
	stereoscope.SetLogger(log.Nested("steroscope"))

	events := subscription.Events()
	go func() {
		for event := range events {
			message.Debug("syft||stereoscope", message.JSONValue(event))
		}
	}()

[Noxsios]

so: layer 9943... is in kustomize-controller linux/amd64 (we already knew that from the logs but wanted to confirm).

It is the first layer in the diff_ids array in the image's config for the rootfs.

I have added logging to syft+stereoscope which can be seen in the CI runs.