데이터베이스 구조 재설계: 단일 DB -> 2개 DB 분리

- kis_data_collection.db: KIS API 데이터 수집용 (data_feed 테이블)
- snapshot_admin.db: 성능/포지션 관리용 (performance, positions 테이블)

도구 경로 업데이트:
- auto_collect_t20_ledger_v1.py: kis_data_collection.db 사용
- measure_sector_flow_reliability_v1.py: kis_data_collection.db 사용
- validate_data_collection_v1.py: snapshot_admin.db 사용
- monitor_wbs_progress_v1.py: snapshot_admin.db 사용
- backup_recovery_manager_v1.py: 2개 DB 모두 백업

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

tools/backup_recovery_manager_v1.py

@@ -45,7 +45,8 @@ class BackupRecoveryManager:
         try:
             # 필요한 파일 목록
             files_to_backup = [
-                self.data_dir / "data_feed.db",
+                self.data_dir / "kis_data_collection.db",
+                self.data_dir / "snapshot_admin.db",
                 self.data_dir / "calibration_registry.yaml",
                 Path("spec") / "12_field_dictionary.yaml",
                 Path("spec") / "13_formula_registry.yaml",
@@ -294,18 +295,21 @@ class BackupRecoveryManager:
             actual_files = len(list(backup_path.glob("*"))) - 1  # metadata 제외
             expected_files = metadata.get("files_backed_up", actual_files)
 
-            # DB 무결성 검증
-            db_file = backup_path / "data_feed.db"
-            db_integrity = "OK"
-            if db_file.exists():
-                try:
-                    conn = sqlite3.connect(db_file)
-                    cursor = conn.execute("PRAGMA integrity_check")
-                    result = cursor.fetchone()
-                    db_integrity = result[0] if result else "UNKNOWN"
-                    conn.close()
-                except Exception:
-                    db_integrity = "FAILED"
+            # DB 무결성 검증 (2개 DB)
+            db_integrity = {}
+            for db_name in ["kis_data_collection.db", "snapshot_admin.db"]:
+                db_file = backup_path / db_name
+                if db_file.exists():
+                    try:
+                        conn = sqlite3.connect(db_file)
+                        cursor = conn.execute("PRAGMA integrity_check")
+                        result = cursor.fetchone()
+                        db_integrity[db_name] = result[0] if result else "UNKNOWN"
+                        conn.close()
+                    except Exception:
+                        db_integrity[db_name] = "FAILED"
+                else:
+                    db_integrity[db_name] = "NOT_FOUND"
 
             return {
                 "backup_name": backup_name,