UX-08 review: tighter notification texts, and two meaning fixes

- not delivering: the body said control keeps running and then "start
  control"; clearing it takes stop then start, and it now says so.
- peak reserve: the "reserve not set" branch is really soc_floor None,
  i.e. an inverter's cut-out level missing; it now names that. The title
  is true on all three branches ("Battery stopped limiting the peak").
- no semicolon run-ons in bodies (STYLE.md + test); loop-bound, circulating,
  meter-frozen and multi-unit over-rating bodies rewritten to match.
- allowlist cap is now exact, so a shrink cannot leave room to regrow.
- DOCS names the settings behind "peak reserve" and "cut-out level";
  DECISIONS no longer states the HA anchor behaviour as fact.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

goodwe_controller/test_watchdog.py

@@ -1112,8 +1112,8 @@ def _says_three(m):
     """UX-08: the three things only this alarm can say, in its plain words
     (messages.circulating): the meter cannot see it, control is stopped at
     0 W, and if the grid does not move a person at the isolator is next."""
-    return ("meter cannot see this" in m and "Control is stopped" in m
-            and "every inverter is set to 0 W" in m and "isolator" in m
+    return ("meter cannot see this" in m and "Control stays stopped" in m
+            and "Every inverter is set to 0 W" in m and "isolator" in m
             and "if the grid power does not change" in m)