viz: floor-to-ceiling method comparison (csv + figure)

Two-stage script: build out/plots/floor_ceiling.csv (one row per arm/anchor,
with SOURCE and STATUS columns flagging every provisional/missing cell) then
the keynote figure. Prints TODO/FIXME data gaps before plotting.

Panel A: normalized floor->ceiling bars, headline deploy (knob-off, test n=119).
Panel B: the knob effect -- arrow knob-ON -> knob-OFF on the SAME held-out val
split (eval_curve.jsonl), isolating the quarantine from the train/test
memorization gap. Fixes the earlier conflation where the train->deploy arrow
mixed knob-on/off with train-problems/test-problems.

Data gaps flagged in csv: solve ceiling provisional=paper 0.223 (FIXME job 24),
prog_wide arm contaminated (TODO job 28 prog_wide_clean).

Co-Authored-By: Claudypoo <288921227+claudypoo@users.noreply.github.com>

out/plots/floor_ceiling.csv

@@ -0,0 +1,8 @@
+label,kind,hack_deploy,solve_deploy,hack_on,hack_off,solve_on,solve_off,source,status
+routeV per-token,method,0.042,0.1429,0.6312,0.025,0.0688,0.0688,20260607T134234_fast_routingV_seed43_dir6_routeV_pertoken_s43/[deploy_test.json + eval_curve.jsonl],ok
+routeV authored,method,0.0756,0.1176,0.6687,0.0187,0.0563,0.0437,20260608T134141_fast_routingV_seed43_dir8_routeV_authored_perroll_s43/[deploy_test.json + eval_curve.jsonl],ok
+routeV prog_wide,method,0.1008,0.1261,0.6937,0.0125,0.0688,0.0563,20260607T195125_fast_routingV_seed43_dir6_routeV_s43/[deploy_test.json + eval_curve.jsonl],TODO: contaminated pairs -> job 28 prog_wide_clean
+routeV random-V,method,0.1008,0.1092,0.7,0.0437,0.075,0.0688,20260608T020623_fast_routingV_seed43_dir6_routeV_random_s43/[deploy_test.json + eval_curve.jsonl],ok (directionality control)
+vanilla GRPO,method,0.6134,0.1008,0.5938,0.5938,0.075,0.075,20260608T224659_fast_vanilla_seed43_dir8_vanilla_s43/[deploy_test.json + eval_curve.jsonl],ok (defines hack-worst anchor)
+base (floor),anchor_floor,0.0,0.1261,,,,,*_dir8_baseline_s43/deploy_test.json,ok (base model; steps=0)
+ceiling,anchor_ceiling,0.0,0.223,,,,,"Ariahw et al. 2025 (paper), NOT our run",FIXME: PROVISIONAL paper 0.223 -- awaiting job 24 (no-loophole ceiling)