PRICE-01 review 3: tests for the round 3 note and dismiss; doc wording

- test_price_secret.py: the fixed-tariff note on the real /config/validate
  route, EN and NL, and none for a spaces-only profile (web.py lang wiring).
- test_price_service.py: the start line is INFO, not WARNING; a dismiss that
  raises does not stop the cycle.
- test_maint13/test_setup_only/test_watchdog: ignore only the dismiss of the
  old card, so a create with that id is still counted.
- DECISIONS rule 7 quotes the settings note as it is; messages.py comment.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Bdqr7PiaHcBnzPituu2yTC

goodwe_controller/test_watchdog.py

@@ -1112,10 +1112,16 @@ check("...and it is still commanding 0 W on the far side of the restart",
       _b.target == 0.0 and "circulation" in _b.reason)
 
 # Not the dismiss of PRICE-01's old fixed-tariff card, sent at every start.
+# Only that dismiss: a `create` with the old id would still be counted.
+def _not_old_dismiss(c):
+    return not (c[1] == "dismiss"
+                and c[2].get("notification_id") == "goodwe_fixed_tariff_unused")
+
+
 _notes1 = [c for c in _h1.calls if c[0] == "persistent_notification"
-           and c[2].get("notification_id") != "goodwe_fixed_tariff_unused"]
+           and _not_old_dismiss(c)]
 _notes2 = [c for c in _h2.calls if c[0] == "persistent_notification"
-           and c[2].get("notification_id") != "goodwe_fixed_tariff_unused"]
+           and _not_old_dismiss(c)]
 print(f"       notifications raised: {len(_notes1)} before the restart, "
       f"{len(_notes2)} after it")
 check("the alarm was raised in the first process", len(_notes1) >= 1)