Add a new protocol configuration markers runbook

[turmelclem]

Content

Introduce a new runbook to persist protocol configuration on chain, it described how to :

• use the new aggregator CLI command to export protocol current protocol configuration
• manually edit JSON
• use the new aggregator CLI command to generate datum
• write datum on chain

Pre-submit checklist

• Branch
  • Tests are provided (if possible)
  • Crates versions are updated (if relevant)
  • CHANGELOG file is updated (if relevant)
  • Commit sequence broadly makes sense
  • Key commits have useful messages
• PR
  • All check jobs of the CI have succeeded
  • Self-reviewed the diff
  • Useful pull request description
  • Reviewer requested
• Documentation
  • Update README file (if relevant)
  • Update documentation website (if relevant)
  • Add dev blog post (if relevant)
  • Add ADR blog post or Dev ADR entry (if relevant)
  • No new TODOs introduced

Issue(s)

This PR closes #3399

[github-actions]

Test Results

     5 files     209 suites   51m 16s ⏱️
 3 396 tests  3 396 ✅ 0 💤 0 ❌
11 250 runs  11 250 ✅ 0 💤 0 ❌

Results for commit 23a4070.

♻️ This comment has been updated with latest results.

[Copilot]

Pull request overview

This PR introduces a new operator runbook under docs/runbook/ that documents how to persist Mithril protocol configuration markers on-chain (bootstrap and update), using the mithril-aggregator CLI and cardano-cli.

Changes:

• Added a step-by-step runbook for exporting current protocol configuration markers, editing the JSON, generating a datum payload, and submitting it on-chain.
• Documented both initial bootstrap (first datum UTxO) and subsequent update flows (re-spending existing datum UTxO).

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[Alenar]

LGTM

[jpraynaud]

LGTM 👍

I left few comments below to make the UX seamless.