feat: extract create embedded docs cache at INDEX stage

[bamthomas]

Is your feature request related to a problem? Please describe.

Avoid errors when accessing embedded files.

Describe the solution you'd like

When we index files with a provided artifactDir option then index stage is extracting all embedded files on disk.

see #1397

[bamthomas]

For now we are using in memory documents when indexing them. it seems in this thread that we cannot stream the data to ES.

[github-actions[bot]]

This issue is stale because it has been open for 40 days with no activity.