Surface scrublet params in single sample processing workflows

[dorien-er]

Changelog

📚 Stacked PR (2 of 3) — review/merge bottom-up

• add qc metric calculation to single sample workflow #1199 — add qc metric calculation — base: main
• 👉 Surface scrublet params in single sample processing workflows #1198 — Surface scrublet params (this PR) — base: qc-metrics-process-singlesample
• Add optional quantile filtering to processing workflows #1200 — Add quantile filtering — base: extend-scrublet-params

Stacked on #1199 — this PR's diff is shown against qc-metrics-process-singlesample, so you only see the scrublet changes. Please review/merge #1199 first.
Merge order: #1199 → 👉 #1198 → #1200.

Issue ticket number and link

Closes #xxxx (Replace xxxx with the GitHub issue number)

Checklist before requesting a review

• I have performed a self-review of my code

• Conforms to the Contributor's guide

• Check the correct box. Does this PR contain:

  • Breaking changes
  • New functionality
  • Major changes
  • Minor changes
  • Documentation
  • Bug fixes

• Proposed changes are described in the CHANGELOG.md

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