refactor: PathFinding 폴더 구조 개선 및 도킹 에러 기능 추가

- PathFinding 폴더를 Core, Validation, Planning, Analysis로 세분화
- 네임스페이스 정리 및 using 문 업데이트
- UnifiedAGVCanvas에 SetDockingError 메서드 추가
- 도킹 검증 시스템 인프라 구축
- DockingValidator 유틸리티 클래스 추가
- 빌드 오류 수정 및 안정성 개선

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Cs_HMI/AGVNavigationCore/PathFinding/Validation/DockingValidationResult.cs

@@ -0,0 +1,103 @@
+using AGVNavigationCore.Models;
+
+namespace AGVNavigationCore.PathFinding.Validation
+{
+    /// <summary>
+    /// 도킹 검증 결과
+    /// </summary>
+    public class DockingValidationResult
+    {
+        /// <summary>
+        /// 도킹 검증이 필요한지 여부 (목적지가 도킹 대상인 경우)
+        /// </summary>
+        public bool IsValidationRequired { get; set; }
+
+        /// <summary>
+        /// 도킹 검증 통과 여부
+        /// </summary>
+        public bool IsValid { get; set; }
+
+        /// <summary>
+        /// 목적지 노드 ID
+        /// </summary>
+        public string TargetNodeId { get; set; }
+
+        /// <summary>
+        /// 목적지 노드 타입
+        /// </summary>
+        public NodeType TargetNodeType { get; set; }
+
+        /// <summary>
+        /// 필요한 도킹 방향
+        /// </summary>
+        public AgvDirection RequiredDockingDirection { get; set; }
+
+        /// <summary>
+        /// 계산된 경로의 마지막 방향
+        /// </summary>
+        public AgvDirection CalculatedFinalDirection { get; set; }
+
+        /// <summary>
+        /// 검증 오류 메시지 (실패시)
+        /// </summary>
+        public string ValidationError { get; set; }
+
+        /// <summary>
+        /// 기본 생성자
+        /// </summary>
+        public DockingValidationResult()
+        {
+            IsValidationRequired = false;
+            IsValid = true;
+            TargetNodeId = string.Empty;
+            RequiredDockingDirection = AgvDirection.Forward;
+            CalculatedFinalDirection = AgvDirection.Forward;
+            ValidationError = string.Empty;
+        }
+
+        /// <summary>
+        /// 검증 불필요한 경우 생성
+        /// </summary>
+        public static DockingValidationResult CreateNotRequired()
+        {
+            return new DockingValidationResult
+            {
+                IsValidationRequired = false,
+                IsValid = true
+            };
+        }
+
+        /// <summary>
+        /// 검증 성공 결과 생성
+        /// </summary>
+        public static DockingValidationResult CreateValid(string targetNodeId, NodeType nodeType, AgvDirection requiredDirection, AgvDirection calculatedDirection)
+        {
+            return new DockingValidationResult
+            {
+                IsValidationRequired = true,
+                IsValid = true,
+                TargetNodeId = targetNodeId,
+                TargetNodeType = nodeType,
+                RequiredDockingDirection = requiredDirection,
+                CalculatedFinalDirection = calculatedDirection
+            };
+        }
+
+        /// <summary>
+        /// 검증 실패 결과 생성
+        /// </summary>
+        public static DockingValidationResult CreateInvalid(string targetNodeId, NodeType nodeType, AgvDirection requiredDirection, AgvDirection calculatedDirection, string error)
+        {
+            return new DockingValidationResult
+            {
+                IsValidationRequired = true,
+                IsValid = false,
+                TargetNodeId = targetNodeId,
+                TargetNodeType = nodeType,
+                RequiredDockingDirection = requiredDirection,
+                CalculatedFinalDirection = calculatedDirection,
+                ValidationError = error
+            };
+        }
+    }
+}