fix(docs): align quickstart PQC keygen and config with nightly platform image

[marythought]

Summary

• The quickstart docker-compose pinned keygen source and config download to service/v0.16.0 while using the nightly platform image
• After feat(core)!: conform hybrid PQ/T key formats to IETF drafts platform#3563 changed the hybrid key PEM format, the nightly image can no longer load keys generated by the v0.16.0 keygen, causing a 502 on /healthz
• Switch both refs to main so they stay in sync with the nightly image

Reported in opentdf/platform#3068 (comment)

Longer-term fix (adding keygen as a platform subcommand) tracked in opentdf/platform#3673.

Test plan

• test-stack CI job passes (currently failing on main)
• Platform healthz returns 200 with PQC keys generated from main

Closes #352

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation
  • Updated the local setup configuration to pull the latest example platform settings from the main branch.
  • Changed the key-generation setup to use the latest main branch source, helping ensure newer setup instructions stay in sync.

[coderabbitai]

📝 Walkthrough

Walkthrough

The quickstart docker-compose setup now downloads opentdf-example.yaml from opentdf/platform/main and pulls PQC key generation sources from origin main.

Changes

Quickstart source updates

Layer / File(s)	Summary
Updated source branches docs/getting-started/docker-compose.yaml	The platform config download command and the PQC key generation container both switch their source branch from service/v0.16.0 to main.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related issues

• opentdf/docs issue 352 — Matches the same docker-compose.yaml branch updates for the config download and PQC key generation steps.

Possibly related PRs

• opentdf/docs#337 — Also updates docs/getting-started/docker-compose.yaml to change which platform config the quickstart pulls.
• opentdf/docs#338 — Also changes the quickstart config source branch and the PQC key generation branch reference in the same file.

Suggested reviewers

• jrschumacher
• pflynn-virtru

Poem

A rabbit hops through setup bright,
From service/v0.16.0 to main so light.
Two branches twirl, then settle in place,
For config and keys in the quickstart space.
🐇✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: syncing quickstart PQC key generation and config with the nightly platform image.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/quickstart-pqc-version-mismatch

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[gemini-code-assist]

Code Review

This pull request updates the docs/getting-started/docker-compose.yaml file to fetch the example configuration and pull source code from the main branch instead of the service/v0.16.0 release branch. There are no review comments, and I have no feedback to provide.

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[marythought]

Confirmed that main fails on the script job, here: https://github.com/opentdf/docs/actions/runs/28251987695/job/83706206391

If it passes in the PR with this fix that is our validation that short term fix works.

[github-actions]

📄 Preview deployed to https://opentdf-docs-pr-353.surge.sh