## Summary
Adds an **operator-only** escape hatch for a card stranded `in-review`
(or `in-progress`) with a workflow step permanently stuck in `pending`
status — the leading real-world cause being a dispatched prompt node
(e.g. `code-review`) whose verdict callback was never received (see
#1946). Transitions the stuck `pending` pre-merge step to `status:
"failed"` with resume audit metadata, so the existing
`fn_task_bypass_review` escape hatch can then clear the merge blocker.
## What changed
- **`WorkflowStepResult`** gains resume audit fields: `resumedBy`,
`resumedAt`, `resumeReason`, `resumedFromStatus`. They are pure audit
trail and **do not** participate in merge-blocking
(`getTaskMergeBlocker`).
- **`findPendingPreMergeStep`** (new helper, exported from
`@fusion/core`) summarizes the stuck-pending pre-merge state for
operator tooling. Ignores post-merge steps; returns the newest pending
pre-merge result.
- **`TaskStore.resumeWorkflowStep(id, { stepId, reason, actor })`** —
the store primitive (eligibility-gated: task must be
`in-review`/`in-progress`, not paused; step must exist and be `pending`;
a mandatory non-blank `reason` and `stepId` are required). Runs under
`withTaskLock`, writes the resume as a terminal `failed` result, appends
a task-log breadcrumb, and emits the new `task:resume-step` run-audit
event.
- **`fn_workflow_step_resume`** — new CLI/pi-extension tool registered
**only** on the operator surface (deliberately **not** wired into
executor/reviewer/triage agent tool lists). Accepts `{ id, stepId,
reason }`; the actor defaults to `cli-operator`.
- **Run-audit**: new `task:resume-step` `DatabaseMutationType` member.
## Why
A prompt-node verdict callback can be lost (dispatched prompt never
receives a verdict), leaving the step `pending` forever. Previously the
only recourse was `fn_task_bypass_review`, which requires a terminal
*failed* pre-merge step to clear the blocker — a permanently `pending`
step could not be bypassed. This PR bridges that gap: resume (pending →
failed) then bypass (failed merge-blocker cleared).
## Verification
- **Typecheck**: `@fusion/core`, `@fusion/engine`, `@runfusion/fusion`
all clean.
- **`task-merge-bypass.test.ts`**: 15/15 pass (incl. 5 new
`findPendingPreMergeStep` cases).
- **`store-resume-step.test.ts`** (new, PG-backed): 9/9 pass —
eligibility gating, resume rewrite + audit fields, run-audit event,
non-pending/non-found/blank-argument rejection, in-progress column
support, property preservation.
- **`extension.test.ts`**: 75/75 pass (expected-tool registration
includes the new tool).
## Files
- `packages/core/src/types/workflow/workflow-steps.ts`
- `packages/core/src/merge/task-merge.ts`
- `packages/core/src/store.ts`
- `packages/core/src/index.ts`
- `packages/core/src/__tests__/store-resume-step.test.ts` (new)
- `packages/core/src/__tests__/task-merge-bypass.test.ts`
- `packages/engine/src/util/run-audit.ts`
- `packages/cli/src/extension.ts`
- `packages/cli/src/__tests__/extension.test.ts`
- `.changeset/stas-032-resume-workflow-step.md` (minor, feature)
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added an operator-only workflow recovery tool for permanently pending
pre-merge steps.
* Operators can mark eligible pending steps as failed by providing a
required audit reason.
* Recovery actions record operator details, timestamps, reasons, prior
status, task logs, and audit events.
* **Bug Fixes**
* Improved selection of the latest pending pre-merge workflow step while
excluding post-merge steps.
* Added validation to prevent recovery of paused, invalid, or
out-of-scope workflow steps.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: schindler <schindler@users.noreply.github.com>
Co-authored-by: gsxdsm <gsxdsm@users.noreply.github.com>
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