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/DECISIONS/PRICE-01-own-price-server.md

@@ -71,8 +71,8 @@ energy only; the framework adds markup and taxes, as for `generic_dayahead`.
    "static_profile is empty" warning, so no notification (round 2's *Fixed
    tariff not used* was false and fired on every sound start; round 3 removed
    it). Instead one INFO line at start (English, as every log line) and an info
-   note beside the setting (EN and NL), saying "Fixed tariff is only used if no
-   prices are available.", both
+   note beside the setting (EN and NL, "With the price service, the fixed
+   tariff is only used if no prices are available."), both
    only with a non-blank `static_profile` (whitespace counts as blank). At
    start the add-on dismisses the old notification id, in case a pre-release
    build raised it.