Give Forge one owner for each status comment

[numinousmuses]

Forge now has one writer for each issue or PR status comment. The workflow only submits work and reports commit checks, with read-only PR access. The alternate task reporter and comment finalizer are removed. The comment replaces its current explanation and shows verification details without an appended activity timeline.

This PR installs the workflow change and updates the guides. It also checks for a changed PR head during polling independently of comment reporting, so an obsolete workflow does not hold up the latest revision.

flowchart LR
  subgraph Before
    A[CI workflow] --> B[Optional progress writer]
    C[Task reporter] --> D[Separate task comment]
    E[Conversation service] --> F[Current status with old updates]
  end
  subgraph After
    G[CI workflow] --> H[Task submission and commit checks]
    H --> I[Conversation service]
    I --> J[One edited status comment per issue or PR]
  end

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Validation: platform tests cover routine transitions, publication, merge, new commits, schedule occurrences, lost acknowledgments, ignored legacy milestones, and rejection of comment access from CI. Fresh issue and scheduled runs are being observed from their first update. The configured checks on this PR cover Darkbloom protocol and documentation, not the Forge platform itself.

[numinousmuses]

Numinous Forge · Merged into this fork

Trigger: CI

This PR has been merged. The recorded checks passed on its reviewed revision.

Next: No further action on this PR.

Verification details

Recorded check	Result
Protocol behavior	Passed
Documentation	Passed

Source revision 05f6bfd255d9. Verification status comes from execution records; agent observations are provisional.

This run verifies the PR and does not modify its code.