UX-10: the last plain-language leftovers: log lines, two table rows, 'Why: Other', red at 0 s

- test_messages.py part 6: every dynamic part of a WARNING+ line is classified
  as data or as a built text, and every built text is produced by the real
  code and checked. This is the gap the 2d scan had: it counted `%s` as one
  word, so reasons built by loop_clamp_note() and friends were never seen.
- Quoted reasons rewritten to STYLE.md (red-alarm shape, codes kept):
  OUTPUT_CLAMP, METER_FROZEN, CIRCULATING_POWER, STALE_READING, the peak
  guard (codes now PEAK_GUARD*), the migration report, price feed, price
  history and gate reasons. Plurals via messages.times()/count().
- Top table: Price history "96 prices over 24 hours for 26 Sep", Tariff
  "one every 15 minutes or every hour", "not final yet" dropped.
- Levels and noise: per-cycle shadow line DEBUG, shadow on/off INFO,
  aiohttp access log only at log level debug, settings warnings once per
  start, one plain line per Home Assistant outage (hass.Outage).
- INFO jargon and error texts: no "§8.3", ISO times, "banked", "keys ARE",
  "NOT_OBSERVED", "did NOT land", "AND".
- Display bugs: WHY_WINNER covers every winner and safety reason
  (main.why_key(), part 7 finds them in the code); the meter row is amber
  "waiting for the first reading" inside its limit after a start; the
  missing-reading age is counted when the page asks.
- STYLE.md and DECISIONS/UX-08-short-notifications.md (UX-10 section).

No change to safety behaviour, alarm levels, notification ids, triggers,
cadence or the banner cascade. One row colour changes (meter at start),
justified in DECISIONS.

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

goodwe_controller/app/maintenance.py

@@ -351,7 +351,7 @@ class Maintenance:
         the action log rather than watching nothing happen.
         """
         if blocked_by:
-            msg = (f"maintenance: forced start REFUSED on {self.name} - "
+            msg = (f"maintenance: {self.name} cannot start now, because "
                    f"{blocked_by}")
             _LOG.warning("%s", msg)
             return [msg]
@@ -378,10 +378,9 @@ class Maintenance:
         """
         if self._deferred != why:
             self._deferred = why
-            msg = (f"maintenance: {self.name} is due and is WAITING its turn - "
-                   f"{why}. It is idle under the control loop and will "
-                   f"recalibrate at the next start hour once the slot is free; "
-                   f"this is not a stalled phase.")
+            msg = (f"maintenance: {self.name} is due and waits its turn, "
+                   f"because {why}. It starts at the next start hour once the "
+                   f"other battery is done. This is not a stalled phase.")
             _LOG.info("%s", msg)
             events.append(msg)
         return events