docs: note that github_token controls the PR comment bot identity

[brovatten]

Smoke test for the CodeBoarding Review GitHub App identity: the architecture-review comment on this PR should be authored by codeboarding-review[bot] (not github-actions[bot]), since this is a fresh PR opened after the app permissions were fixed.

Carries a small real change: the github_token input docs now mention that the token determines the comment's bot identity.

🤖 Generated with Claude Code

[codeboarding-review]

Architecture review · no architectural changes

graph LR
    n_Analysis_Orchestration_Engine["Analysis Orchestration Engine"]
    n_Visual_Diff_Mermaid_Generator["Visual Diff #amp; Mermaid Generator"]
    n_UX_Integration_Layer["UX #amp; Integration Layer"]
    n_Analysis_Orchestration_Engine -- "Provides analysis artifacts and triggers diffin…" --> n_Visual_Diff_Mermaid_Generator
    n_Visual_Diff_Mermaid_Generator -- "Passes Mermaid diagram and context for CTA gene…" --> n_UX_Integration_Layer
    n_UX_Integration_Layer -- "Finalizes augmented analysis for GitHub PR comm…" --> n_Analysis_Orchestration_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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_{codeboarding-action · run 27308822446}