feat: add run replay for archetype effectiveness analysis

- archeflow-decision.sh records decision points during runs
- archeflow-replay.sh: timeline, whatif, compare commands
- What-if replay with adjustable archetype weights
- /af-replay skill for interactive use
- Tests in archeflow-replay.bats

docs/status.md

@@ -1,5 +1,11 @@
 # ArcheFlow — Status Log
 
+## 2026-04-06: Run replay (v0.9.0)
+
+- `lib/archeflow-decision.sh` — append `decision.point` (phase, archetype, input, decision, confidence).
+- `lib/archeflow-replay.sh` — `timeline` / `whatif` (weighted archetypes, threshold) / `compare`; optional `--json`.
+- Skill `af-replay`, plugin bump, DAG renders `decision.point`, `tests/archeflow-replay.bats`.
+
 ## 2026-04-04: Triple Release Sprint (v0.4 → v0.6)
 
 ### What happened