Show Stage's release-baseline warnings in Preview and Generate #643

Stage now warns when a plan would change the meaning of shipped events (release baseline, Cratis/Stage#375 in PR Cratis/Stage#385). Studio's PlanFrom path doesn't pass a baseline yet, so Studio users never see those warnings.

Wanted

• Studio reads the project's .screenplay/release-baseline.json, or carries the workspace's baseline, and passes a ReleaseBaselineAssessment (StageReleaseBaseline.Check(workspace, ReleaseBaselineStore.Read(...))) on the loaded model / ArtifactRenderRequest.ReleaseBaseline.
• Preview and Generate show the STAGE-BASELINE-001..004 warnings. They are warnings only; Stage never refuses on them.
• Needs the Stage release that contains PR Update the shared Cratis AI corpus #385. The cli counterpart is cratis render: pass the release-baseline assessment to Stage and report STAGE-BASELINE warnings cli#356.

Status

State: Done — Shipped in #1788 (0.180.0, live)
Branch: studio-628-query-error (https://github.com/Cratis/Studio/pull/1788)
Scope: Pass the release baseline to Stage and show STAGE-BASELINE-001..004 in Preview and Generate. Design first; may wait for a Stage on Screenplay >= 4.159.
Delivered: Nothing yet.
Remaining: To be confirmed.
Follow-ups: None.