Epic: workflow self-healing and fix suggestions on dead-end

[graycyrus]

Summary

src/workflows/judge.rs already computes SufficiencyVerdict::Escalate { gap } when a workflow step's output looks insufficient, but gap is only a coarse 3-value category (Information/Infrastructure/Transient) and nothing downstream builds an actual suggested fix — it's used only to decide park-vs-fail.

Depends on #2008 landing first (tracked in the Workflow Pause & Resume epic, #1860) — suggesting a fix on top of an unreliable resume path is building on sand.

Plan

• Expand Escalate{gap} into a structured, explainable gap description
• Suggestion engine: propose an edited workflow covering the missed case
• Surface suggestions in the console (accept / edit / dismiss)

Part of

September 2026 roadmap. Blocked on #2008.

[tinysweeper]

Epic: workflow self-healing and fix suggestions on dead-end

Labelled priority: p3.