[1.0] Extend project-authoring golden journey and documentation drift coverage

[jeremi]

Context

The five init-able project starters have generated documentation snippets and anti-drift checks. Additional maintained golden workspaces, including Relay-only, Notary-only, snapshot-with-records, and country-variant OpenCRVS journeys, still rely on hand-maintained prose or partial workflow tests.

The primary project-authoring tutorial also remains marked as draft. This is a coverage and discoverability follow-up, not a reason to add fake starters for workspaces that are intentionally not starter templates.

Scope

• Map each maintained golden workspace to the workflow steps it genuinely supports: init, test, trace, watch, check with explanation, and build.
• Add missing success and negative tests only for supported steps.
• Generate or mechanically validate documentation snippets for non-starter golden workspaces without pretending they support init.
• Finish and publish the primary Registry Stack project-authoring tutorial, remove its draft status, and link it from the main author path.
• Preserve the distinction between offline fixture evidence and live integration evidence.

Acceptance criteria

• Every documented command for a maintained golden workspace is exercised by an automated check.
• Relay-only and Notary-only topologies have successful check and build proof, plus fixture proof where fixtures apply.
• Snapshot and country-variant examples cannot drift silently from their schemas or CLI flags.
• Non-starter workspaces are never advertised as init-able starters.
• The primary project-authoring tutorial is published, reachable from the main documentation author path, and uses only commands covered by automated checks.
• OpenSPP remains offline-fixture-only until the owner-run holdout in Complete the owner-run OpenSPP live authoring holdout for 1.0 #357.

Related work

• refactor: make Registry project authoring the single friendly config surface #311
• Converge Relay and Notary on Registry Stack project authoring #355
• Complete the owner-run OpenSPP live authoring holdout for 1.0 #357

[jeremi]

Golden combined topologies should now prove one Notary per Relay authority, with each Notary using its own PostgreSQL correctness state. No golden journey should depend on deprecated Registry Lab, Redis, or hand-edited generated YAML. Solmara remains the separate adopter topology.