fix(catalog): unify negation guard and harden round-2 evaluators

A shared NoUnnegatedMention primitive replaces four per-category
implementations, with a bidirectional clause-scoped window and an
adjectival cue set. The docker layer fixture drops WORKDIR, which
creates a real layer and made the pinned answer wrong. The replica
failover test now forces a JSON verdict so a negated answer cannot
score. Remaining exact-answer tests migrate to ExactToken. Ordering
prompts shuffle their candidate lists so echoing scores zero.

internal/tests/databases_redis_test.go

@@ -44,8 +44,8 @@ func TestDBRedisStructureChoiceTest_Eval(t *testing.T) {
 	}
 }
 
-func TestDBRedisTTLEvictionTest_Eval(t *testing.T) {
-	tc := dbRedisTTLEvictionTest()
+func TestDBRedisNoevictionWriteTest_Eval(t *testing.T) {
+	tc := dbRedisNoevictionWriteTest()
 
 	tests := []struct {
 		name     string