UX-08 2c: short refusals, error texts and option texts

Validator refusals name the setting by its label and key, say what is
wrong and what to change, and keep the rejected value and limit. Option
names and descriptions are short in en and nl; citations moved to DOCS
"For installers" and the test_translations citation check now pins the
instruction on the tab and the record in DOCS. No rule, key, schema,
default or exit code changed. Allowlist 167 -> 43 (log lines only).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LyR88rXETvwhTgx6yHE39p

goodwe_controller/test_static_tariff.py

@@ -850,7 +850,7 @@ check("a good static_profile starts",
 check("a gapped one is REFUSED at startup, not at 22:00 on the day it bites",
       why(validate_startup_config(vbase(static_profile=json.dumps(_gap)),
                                   -5000, 5000),
-          "static_profile cannot be used"))
+          "“Fixed or day/night tariff” cannot be used"))
 check("...and the refusal names the uncovered range",
       why(validate_startup_config(vbase(static_profile=json.dumps(_gap)),
                                   -5000, 5000), "22:00-23:00"))
@@ -859,7 +859,7 @@ check("static_profile alongside the Home Assistant price entities is refused - "
       why(validate_startup_config(
           vbase(static_profile=json.dumps(TWO_PERIOD),
                 price_now_entity="sensor.now", price_avg_entity="sensor.avg"),
-          -5000, 5000), "HOME ASSISTANT"))
+          -5000, 5000), "Home Assistant price entities would count"))
 check("...and the Home Assistant pair ALONE still starts, so nothing is taken "
       "away from a live install",
       validate_startup_config(vbase(price_now_entity="sensor.now",