reorg: out/ sorted by datatype (vhack/ pools/ runs/ vhack_grads/ figs/)

Code writes+reads the new scheme; migrate_out_dirs.py moved 225 loose artifacts
(0 left at top level). Per-run checkpoints+rollouts now group under
runs/<ts>_<run_id>/ as train.safetensors/rollouts.jsonl. Figures land in
out/figs/ with a stable docs/figs/<name>.png symlink (figs.link_latest).
justfile also gains run-cell REFRESH param (online-erasure arm). Smoke +
smoke-vanilla + results all green on new paths. Requeue manifest preserves the
why/resolve labels that pueue reset wiped.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

scripts/plot_route_evidence.py

@@ -20,6 +20,8 @@ matplotlib.use("Agg")
 import matplotlib.pyplot as plt
 import tyro
 
+from projected_grpo.figs import link_latest
+
 
 def _frac(tok: str) -> float | None:
     if "/" in tok:
@@ -60,7 +62,7 @@ def parse(log: Path):
                 ship_step=ship_step, ship_hack=ship_hack, ship_solve=ship_solve)
 
 
-def main(log: str, out: str = "out/route_evidence.png") -> None:
+def main(log: str, out: str = "out/figs/route_evidence.png") -> None:
     d = parse(Path(log))
     RED, GREY = "#b03a2e", "#9a8c7a"            # hack=red (the story); solve=muted (context)
     fig, ax = plt.subplots(figsize=(7, 4))
@@ -93,7 +95,9 @@ def main(log: str, out: str = "out/route_evidence.png") -> None:
     fig.tight_layout()
     Path(out).parent.mkdir(parents=True, exist_ok=True)
     fig.savefig(out, dpi=130)
-    print(f"wrote {out}  (train_hack_final={d['train_hack'][-1]:.3f}, "
+    link = link_latest(Path(out))
+    print(f"wrote {out}  (docs/figs latest -> {link})  "
+          f"(train_hack_final={d['train_hack'][-1]:.3f}, "
           f"ship_hack_final={d['ship_hack'][-1]:.3f}, ship_solve_final={d['ship_solve'][-1]:.3f})")