Add full-period S/R production comparison

docs/research/sr-levels-and-exits.md

@@ -620,6 +620,28 @@ two-arm residual matrix therefore holds the clean detector and range factor fixe
 .venv/bin/python scripts/run_sr_v2_matrix.py residual --workers 14
 ```
 
+### Full-period production comparison
+
+After freezing `rewrite_range504_structural_legacy_primary`, run it beside a
+fresh `production_control` over the complete snapshot with identical portfolio
+and exit settings:
+
+```bash
+.venv/bin/python scripts/run_sr_v2_matrix.py full --workers 14
+```
+
+The command deliberately supplies neither `--entry-start` nor `--entry-end`.
+It writes both audited reports plus a paired cohort comparison:
+
+- `reports/backtest-sr-full-production_control.json`
+- `reports/backtest-sr-full-rewrite_range504_structural_legacy_primary.json`
+- `reports/sr-full-production-vs-candidate-cohorts.csv`
+- `reports/sr-full-production-vs-candidate-comparison.json`
+
+This is an apples-to-apples full-history diagnostic against the current live
+production path. It is not a new untouched holdout because the post-2024 data
+was already inspected while isolating the range factor.
+
 The post-2024 window has been opened and is now analysis data, not a valid final
 promotion holdout. These arms can isolate mechanism, but neither may ship without
 new future data or a separately pre-registered walk-forward protocol.