SAFETY-125: a grid charge counts a late meter reading's seconds; the guard row says "over" when it is

A meter reading late near a quarter's end left seconds the projection did
not count (SAFETY-99), and charge_headroom_w() read them as room: the cheap
run (and price trading, and the N=2 maintenance charge) went back to full
power in the quarter's last seconds and the quarter could land over a banked
month peak or the cap. peakguard.charge_room_w() counts those seconds at the
held reading for the charge only; the guard's floor is unchanged.

The guard row said "idle, heading for 5 814 W, under this month's 5 413 W
peak". Over the limit at the current rate the row and the month-peak line
now say so, and that the grid charge is cut back.

Version 0.19.2, CHANGELOG, DECISIONS. test_safety125.py new; the lag pins
in test_price_run_fixes.py and test_opt20.py and the AST pin in
test_arbitrage.py follow the change (see the pull request).

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

goodwe_controller/app/messages.py

@@ -1170,12 +1170,22 @@ def row_periods_measured(n) -> str:
               f"Gemeten kwartieren deze maand: {getoond}")
 
 
-def row_peak_guard_idle(projected_w, limit_w, month_peak: bool) -> str:
-    """The projection first and the limit second (SAFETY-38's ordered pair)."""
+def row_peak_guard_idle(projected_w, limit_w, month_peak: bool,
+                        cut: bool = False) -> str:
+    """The projection first and the limit second (SAFETY-38's ordered pair).
+    SAFETY-125: over the limit at this rate it says so, and `cut` that a
+    grid charge is cut back to the room left."""
     limit = (f"this month's {watts(limit_w)} peak" if month_peak
              else f"the {watts(limit_w)} peak limit")
     grens = (f"de maandpiek van {watts(limit_w)}" if month_peak
              else f"de piekgrens van {watts(limit_w)}")
+    if float(projected_w) > float(limit_w):
+        doing, doet = (("cutting the grid charge", "schroeft het laden van "
+                        "het net terug") if cut else ("idle", "in rust"))
+        return Bi(f"Peak guard: {doing}, at this rate {watts(projected_w)}, "
+                  f"over {limit}",
+                  f"Piekbewaking: {doet}, aan dit tempo "
+                  f"{watts(projected_w)}, boven {grens}")
     return Bi(f"Peak guard: idle, heading for {watts(projected_w)}, under "
               f"{limit}",
               f"Piekbewaking: in rust, richting {watts(projected_w)}, onder "