🐛 Fix: Project.name → project_name 속성명 수정 및 보고서 시스템 안정화

- backend/routers/reports.py: project.name을 project.project_name으로 수정 (3곳)
- 일일보고서 엑셀 내보내기 오류 해결
- 배포 가이드 업데이트 (DEPLOYMENT_GUIDE_20251028.md)
- 프로젝트 속성명 불일치로 인한 500 에러 해결

Fixes: 'Project' object has no attribute 'name' 오류

backend/routers/management.py

@@ -6,7 +6,7 @@ from typing import List
 from database.database import get_db
 from database.models import Issue, User, ReviewStatus
 from database.schemas import (
-    ManagementUpdateRequest, AdditionalInfoUpdateRequest, Issue as IssueSchema
+    ManagementUpdateRequest, AdditionalInfoUpdateRequest, Issue as IssueSchema, DailyReportStats
 )
 from routers.auth import get_current_user
 from routers.page_permissions import check_page_access
@@ -172,3 +172,41 @@ async def get_additional_info(
         "additional_info_updated_at": issue.additional_info_updated_at,
         "additional_info_updated_by_id": issue.additional_info_updated_by_id
     }
+
+@router.get("/stats", response_model=DailyReportStats)
+async def get_management_stats(
+    project_id: int,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """
+    프로젝트별 관리함 통계 조회 (보고서용)
+    """
+    # 관리함 페이지 권한 확인
+    if not check_page_access(current_user.id, 'issues_management', db):
+        raise HTTPException(status_code=403, detail="관리함 접근 권한이 없습니다.")
+    
+    # 해당 프로젝트의 관리함 이슈들 조회
+    issues = db.query(Issue).filter(
+        Issue.project_id == project_id,
+        Issue.review_status.in_([ReviewStatus.in_progress, ReviewStatus.completed])
+    ).all()
+    
+    # 통계 계산
+    stats = DailyReportStats()
+    today = datetime.now().date()
+    
+    for issue in issues:
+        stats.total_count += 1
+        
+        if issue.review_status == ReviewStatus.in_progress:
+            stats.management_count += 1
+            
+            # 지연 여부 확인
+            if issue.expected_completion_date and issue.expected_completion_date < today:
+                stats.delayed_count += 1
+                
+        elif issue.review_status == ReviewStatus.completed:
+            stats.completed_count += 1
+    
+    return stats