test: 전투 차등 계측 범위를 엄격하게 보강한다

fixture 시각을 DB 변경 없이 고정하고 활성 스킬과 fixture identity를 노출해 Core의 전체 상태·RNG·로그 비교가 첫 차이에서 실패하도록 한다.

hwe/compare/battle_trace.php

@@ -151,12 +151,37 @@ function comparisonBuildGeneral(
     );
 }
 
-function comparisonRunBattle(array $fixture): array
+/**
+ * Some legacy battle items read game time through KVStorage instead of the
+ * General/WarUnit time arguments. Seed only the process-local cache so each
+ * comparison fixture observes its own clock without mutating the shared Ref DB.
+ */
+function comparisonOverrideGameTime(int $year, int $month, int $startYear): void
+{
+    $gameStorage = KVStorage::getStorage(DB::db(), 'game_env');
+    $cacheProperty = new \ReflectionProperty(KVStorage::class, 'cacheData');
+    $cacheProperty->setAccessible(true);
+    $cache = $cacheProperty->getValue($gameStorage);
+    if (!($cache instanceof Map)) {
+        $cache = new Map();
+    }
+    $cache['year'] = $year;
+    $cache['month'] = $month;
+    $cache['startyear'] = $startYear;
+    $cacheProperty->setValue($gameStorage, $cache);
+}
+
+function comparisonRunBattle(array $fixture, ?string $fixtureJson = null): array
 {
     $seed = (string)($fixture['seed'] ?? 'battle-differential');
+    $identityJson = trim($fixtureJson ?? json_encode(
+        $fixture,
+        JSON_THROW_ON_ERROR | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRESERVE_ZERO_FRACTION,
+    ));
     $year = (int)$fixture['year'];
     $month = (int)$fixture['month'];
     $startYear = (int)($fixture['startYear'] ?? 180);
+    comparisonOverrideGameTime($year, $month, $startYear);
     $rawAttacker = $fixture['attackerGeneral'];
     $rawAttackerCity = $fixture['attackerCity'];
     $rawAttackerNation = $fixture['attackerNation'];
@@ -257,6 +282,11 @@ function comparisonRunBattle(array $fixture): array
     return [
         'engine' => 'ref',
         'seed' => $seed,
+        'fixtureIdentity' => [
+            'schemaVersion' => 1,
+            'seed' => $seed,
+            'sha256' => hash('sha256', $identityJson),
+        ],
         'conquered' => $conquered,
         'attacker' => buildWarTraceUnitSnapshot($attacker),
         'city' => buildWarTraceUnitSnapshot($city),
@@ -286,7 +316,7 @@ if ($fixturePath === '--jsonl') {
             }
             $fixture = json_decode($line, true, flags: JSON_THROW_ON_ERROR);
             echo json_encode(
-                comparisonRunBattle($fixture),
+                comparisonRunBattle($fixture, $line),
                 JSON_THROW_ON_ERROR | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRESERVE_ZERO_FRACTION,
             ), PHP_EOL;
         }
@@ -305,7 +335,7 @@ try {
     $fixtureJson = $fixturePath === '-' ? stream_get_contents(STDIN) : file_get_contents($fixturePath);
     $fixture = json_decode((string)$fixtureJson, true, flags: JSON_THROW_ON_ERROR);
     echo json_encode(
-        comparisonRunBattle($fixture),
+        comparisonRunBattle($fixture, (string)$fixtureJson),
         JSON_THROW_ON_ERROR | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRESERVE_ZERO_FRACTION,
     ), PHP_EOL;
 } catch (\Throwable $throwable) {

hwe/process_war.php

@@ -661,12 +661,14 @@ function buildWarTraceUnitSnapshot(WarUnit $unit): array
         'realPhase' => $unit->getRealPhase(),
         'maxPhase' => $unit->getMaxPhase(),
         'hp' => $unit->getHP(),
-        'rawWarPower' => $unit->getRawWarPower(),
+        // Ref leaves warPower uninitialized until beginPhase(). Canonical
+        // traces use numeric zero for that not-yet-computed state, as Core does.
+        'rawWarPower' => $unit->getRawWarPower() ?? 0,
         'warPower' => $unit->getWarPower(),
         'warPowerMultiplier' => $unit->getWarPowerMultiply(),
         'killed' => $unit->getKilled(),
         'dead' => $unit->getDead(),
-        'activatedSkills' => $unit->getActivatedSkillLog(),
+        'activatedSkills' => $unit->getActivatedSkillTraceSnapshot(),
     ];
 
     if ($unit instanceof WarUnitGeneral) {

hwe/sammo/WarUnit.php

@@ -120,6 +120,24 @@ class WarUnit
         return $this->logActivatedSkill;
     }
 
+    /**
+     * Comparison traces observe a phase before clearActivatedSkill() runs.
+     * Keep the product-facing cumulative accessor above unchanged, while
+     * exposing the canonical logged + currently-active view used by Core's
+     * WarBattleTraceUnitSnapshot.
+     */
+    function getActivatedSkillTraceSnapshot(): array
+    {
+        $snapshot = $this->logActivatedSkill;
+        foreach ($this->activatedSkill as $skillName => $state) {
+            if (!$state) {
+                continue;
+            }
+            $snapshot[$skillName] = ($snapshot[$skillName] ?? 0) + 1;
+        }
+        return $snapshot;
+    }
+
     function getRawNation(): array
     {
         return $this->rawNation;