SAFETY-136 round 2: tests for override and direction, true wording

F1 the on-change case is tested as slow, F2 override and direction checks,
F3 the 3.75 s rule in the texts, F4 the quarter figures and the live note.
No behaviour change.

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

goodwe_controller/DECISIONS/SAFETY-136-slow-meter-settle.md

@@ -18,7 +18,7 @@ limit of SAFETY-128's fast meter fit). It counts arrivals, not changes of
 value: on the recorded day at 1-2 s the value-based test (`MeterFit.slow()`)
 called 24 % of the cycles slow, because the recorded house repeats a value
 for 5 s or more, and the commands then differed from base. So there is no
-option. At a 1-3 s meter it is false, the tuning is never touched and the
+option. At a meter with a usual gap of 3.75 s or less (1-3 s) it is false, the tuning is never touched and the
 commands are those of the tree before. A meter that Home Assistant passes on
 only when its value changes looks as slow as its changes are far apart, as it
 does to SAFETY-128's fits: a 1-2 s meter with a value that holds for 5 s or
@@ -63,10 +63,18 @@ from base. Together their export is 10 363 -> 9 559 Wh (-8 %) and import
 8 389 -> 7 835 Wh (-7 %). Only 5 export more than 1 Wh and 14 import more:
 export by at most 11.5 Wh (a 10 s battery lag, +10 %), import by at most
 17 Wh (a 12 s dead time, one inverter, +7 %), and the quarter average by at
-most 35 W, once 73 W (10 s meter, 10 s dead time, export -59 Wh). Slow
+most 35 W, except two import quarters: +73 W (10 s meter, 10 s dead time,
+export -59 Wh) and +40 W (`dead10_p6`, -6 to 34 W, export -68 Wh). Slow
 batteries with a dead time of 8-10 s export 5-39 % less; a 12 s dead time is
 the same. `READINGS_LATE` holds are the same seconds in every run.
 
+**Live, a 1-2 s meter can be judged slow.** Through Home Assistant on change,
+a value that holds for 4-10 s makes a 1 s meter slow. In 20 rig scenarios the
+commands were those of base. On the recorded day (1 s, N=1, 1 day, repeats
+dropped; its values hold about 5 s) it was slow in 33 % of cycles, half gain
+in 83 cycles, 15 422 commands in both trees, 4 016 with another value (at
+most 190 W apart), cost 0.61 EUR in both (review of SAFETY-136).
+
 **Does not change.** Meters of 1-2 s: the same commands in all 63 runs (34
 at 1 s, 29 at 2 s), and the recorded-day digests (see the report). The late
 verdict, the hold and the freeze tests. 15 s late is only partly helped, and