CI-02 probe F: the ORIGINAL gate, unchanged, on the same unmergeable PR

goodwe_controller/test_peakguard.py

@@ -72,6 +72,13 @@ Two days is also not thirty. AC 3's 95 %-over-30-days criterion is TARIFF-01's
 and is still not met; `test_tariff.py`'s part 9 says so at length and this file
 does not re-litigate it. What part 6 reports is the comparison that two days CAN
 support: the same quarters, with and without the guard.
+
+⚠️ MUTATING THE MODULE THIS FILE GRADES? PURGE `__pycache__` FIRST - or run
+`tools/mutation_run.sh`, which does. `python3 -B` alone does NOT save you: it
+stops bytecode being WRITTEN, not a stale one being READ, and a size-preserving
+edit reverted inside one second is invisible to CPython's staleness test. That
+is TEST-15, and it has already turned one live mutation into a false survivor.
+Read MUTATION.md before you report a survivor.
 """
 
 import asyncio