fix(review): stop labelling a base with the run that computed it

[Svilen-Stefanov]

Missed the 1.12.0 release: it was pushed to #93's branch after that PR merged, so it is on the branch but not in main.

The defect

A base graph describes one commit and is shared by every pull request that forks there — the name is codeboarding-base-<cfg>-<merge_base_sha>, with no pull request in it. But its metadata.json carried the pr_number and head_sha of whichever run happened to build it:

{ "kind": "base", "merge_base_sha": "c9e4c7cf…", "pr_number": "92", "head_sha": "…" }

So a shared object looked owned by one pull request it has nothing to do with. Anyone reading it would reasonably conclude bases are per pull request, and either dedupe them wrongly or distrust the sharing.

Those two fields are now written only for a warm-start bundle, which genuinely does belong to one pull request. A base marker is kind, merge_base_sha, cfg_hash, engine_version.

Verification

test_a_base_is_not_labelled_with_the_run_that_computed_it asserts a staged base has no pr_number or head_sha, alongside the existing check that a warm-start does. 94 tests pass.

Metadata only — no behavioural change to what is published, fetched or reused.

🤖 Generated with Claude Code

[codeboarding-review]

CodeBoarding review

Status: 0 changed components

See the full change in CodeBoarding.

graph LR
    n_Visual_Rendering_Engine["Visual Rendering Engine"]
    n_Structural_Diff_Engine["Structural Diff Engine"]
    n_Interaction_Orchestrator["Interaction Orchestrator"]
    n_Visual_Rendering_Engine -- "Returns rendering metadata and diagram artifacts" --> n_Interaction_Orchestrator
    n_Structural_Diff_Engine -- "Provides annotated diff model for visualization" --> n_Visual_Rendering_Engine
    n_Interaction_Orchestrator -- "Triggers structural comparison via CLI" --> n_Structural_Diff_Engine
    classDef added fill:#1f883d,stroke:#0b5d23,color:#ffffff;
    classDef modified fill:#bf8700,stroke:#7d4e00,color:#ffffff;
    classDef deleted fill:#cf222e,stroke:#82071e,color:#ffffff,stroke-dasharray:5 3;

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_{download artifacts · run 32306870781}