feat: 보스 공통 패턴 간격 추가

- BossBehaviorRuntimeState에 패턴 종료 후 공통 텀과 준비 판정을 추가\n- UsePatternAction이 런타임 패턴 실행 결과와 공통 텀을 함께 사용하도록 정리\n- 드로그 PlayMode 테스트에 패턴 종료 후 공통 간격 검증 케이스를 추가

Assets/_Game/Scripts/Enemy/BossBehaviorRuntimeState.cs

@@ -46,6 +46,8 @@ namespace Colosseum.Enemy
         [Header("Pattern Flow")]
         [Tooltip("대형 패턴(시그니처/기동/조합) 직후 기본 패턴 최소 순환 횟수")]
         [Min(0)] [SerializeField] protected int basicLoopMinCountAfterBigPattern = 2;
+        [Tooltip("패턴 하나가 끝난 뒤 다음 패턴을 시작하기까지의 공통 텀")]
+        [Min(0f)] [SerializeField] protected float commonPatternInterval = 0.35f;
 
         [Header("시그니처 효과 설정")]
         [Tooltip("시그니처 패턴 차단에 필요한 누적 피해 비율")]
@@ -93,6 +95,7 @@ namespace Colosseum.Enemy
         protected int basicLoopCountSinceLastBigPattern;
         protected int currentPatternPhase = 1;
         protected float currentPhaseStartTime;
+        protected float nextPatternReadyTime;
         protected BossPatternExecutionResult lastPatternExecutionResult;
         protected BossPatternData lastExecutedPattern;
         protected GameObject lastReviveCaster;
@@ -124,6 +127,11 @@ namespace Colosseum.Enemy
         /// </summary>
         public int BasicLoopCountSinceLastBigPattern => basicLoopCountSinceLastBigPattern;
 
+        /// <summary>
+        /// 패턴 종료 후 다음 패턴 시작까지 남은 공통 텀입니다.
+        /// </summary>
+        public float RemainingPatternInterval => Mathf.Max(0f, nextPatternReadyTime - Time.time);
+
         /// <summary>
         /// 마지막 패턴 실행 결과
         /// </summary>
@@ -276,6 +284,9 @@ namespace Colosseum.Enemy
         {
             lastExecutedPattern = pattern;
             lastPatternExecutionResult = result;
+
+            if (pattern != null && IsTerminalPatternExecutionResult(result))
+                StartCommonPatternInterval();
         }
 
         /// <summary>
@@ -386,6 +397,9 @@ namespace Colosseum.Enemy
             if (pattern == null || pattern.Steps == null || pattern.Steps.Count == 0)
                 return false;
 
+            if (!IsCommonPatternIntervalReady())
+                return false;
+
             if (!patternCooldownTracker.TryGetValue(pattern, out float readyTime))
                 return true;
 
@@ -401,6 +415,22 @@ namespace Colosseum.Enemy
                 patternCooldownTracker[pattern] = Time.time + pattern.Cooldown;
         }
 
+        /// <summary>
+        /// 공통 패턴 텀이 끝났는지 반환합니다.
+        /// </summary>
+        public bool IsCommonPatternIntervalReady()
+        {
+            return Time.time >= nextPatternReadyTime;
+        }
+
+        /// <summary>
+        /// 현재 시점부터 공통 패턴 텀을 다시 시작합니다.
+        /// </summary>
+        public void StartCommonPatternInterval()
+        {
+            nextPatternReadyTime = Time.time + Mathf.Max(0f, commonPatternInterval);
+        }
+
         protected void StopMovement()
         {
             if (navMeshAgent == null || !navMeshAgent.enabled)
@@ -435,6 +465,7 @@ namespace Colosseum.Enemy
         {
             currentPatternPhase = 1;
             currentPhaseStartTime = Time.time;
+            nextPatternReadyTime = 0f;
             lastPatternExecutionResult = BossPatternExecutionResult.None;
             lastExecutedPattern = null;
             lastReviveCaster = null;
@@ -443,6 +474,13 @@ namespace Colosseum.Enemy
             customPhaseConditions.Clear();
         }
 
+        private static bool IsTerminalPatternExecutionResult(BossPatternExecutionResult result)
+        {
+            return result == BossPatternExecutionResult.Succeeded
+                || result == BossPatternExecutionResult.Failed
+                || result == BossPatternExecutionResult.Cancelled;
+        }
+
         public override void OnNetworkDespawn()
         {
             if (IsServer)