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_watchdog.py

@@ -154,7 +154,7 @@ p = validate_startup_config({**base, "max_w": 2000, "sign_disagree_w": 300},
 check("300 W under a 2000 W ceiling is accepted", p == [])
 p = validate_startup_config({**base, "max_w": 2000, "sign_disagree_w": 2000},
                             -5000, 5000)
-check("a threshold AT max_w is refused", len(p) == 1 and "never fire" in p[0])
+check("a threshold AT max_w is refused", len(p) == 1 and "can never trip" in p[0])
 # ⚠️ maintenance_charge_w is named here only to keep this case about the SIGN
 # rule. MAINT-04 added a second rule against the same ceiling, and a 500 W
 # max_w is also below the 2000 W shipped maintenance charge - so without this
@@ -162,7 +162,7 @@ check("a threshold AT max_w is refused", len(p) == 1 and "never fire" in p[0])
 # `len(p) == 1` below would be measuring the interaction rather than this rule.
 p = validate_startup_config({**base, "max_w": 500, "sign_disagree_w": 3000,
                              "maintenance_charge_w": 500}, -5000, 5000)
-check("a threshold above max_w is refused", len(p) == 1 and "never fire" in p[0])
+check("a threshold above max_w is refused", len(p) == 1 and "can never trip" in p[0])
 p = validate_startup_config({**base, "max_w": 2000, "sign_disagree_w": 1999},
                             -5000, 5000)
 check("one watt under the ceiling is reachable, so accepted", p == [])