Add run records, step state machine, verification and exercise-status diff (RBT-WP-0003)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Assistant: claude-code
Assistant-Model: sonnet
Assistant-Process: 295952@bnt-lap001
Assistant-Session: e93f64ad-516c-46eb-9666-aad8d300c477

workplans/RBT-WP-0003-engine-core-run-state-and-evidence.md

@@ -4,7 +4,7 @@ type: workplan
 title: "Engine core: run state and evidence"
 domain: infotech
 repo: runbook-tutorials
-status: ready
+status: finished
 flavor: implementation
 owner: claude
 topic_slug: stack
@@ -24,12 +24,12 @@ exercise status.
 
 ```task
 id: RBT-WP-0003-T01
-status: todo
+status: done
 priority: high
 state_hub_task_id: "e61fbba9-d69f-59d4-ad86-c1fab69e8171"
 ```
 
-Specify `runbook-run/v0.1`: pack id and revision, operator label, parameter
+Specified in `docs/run-spec.md`: `runbook-run/v0.1`: pack id and revision, operator label, parameter
 values, per-step state (`todo|running|done|failed|skipped`), timestamps,
 evidence facts, verification results. Non-secret only, with the same secret-marker
 rejection as packs. Stored under `.local/runbook-runs/` in the repo being operated.
@@ -38,7 +38,7 @@ rejection as packs. Stored under `.local/runbook-runs/` in the repo being operat
 
 ```task
 id: RBT-WP-0003-T02
-status: todo
+status: done
 priority: high
 state_hub_task_id: "fb10ebd1-d122-5b5f-9fd5-83d08539f8c1"
 ```
@@ -51,7 +51,7 @@ resume.
 
 ```task
 id: RBT-WP-0003-T03
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "870980df-c1e8-51e5-9a00-643f63404783"
 ```
@@ -64,7 +64,7 @@ it, with a timeout and captured output size only (no output stored).
 
 ```task
 id: RBT-WP-0003-T04
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "bad99b81-2b64-520f-b92f-1b8c6457659b"
 ```