System Extension注册完成 + FSKit Driver待办事项

已完成：
✅ App ID（6770506571）
✅ Bundle ID（com.momentry.markbase.fskit）
✅ Developer ID Application证书导入
✅ .app Bundle创建（build/MarkBaseFSKit.app）
✅ entitlements.plist配置

限制：
- binary未实现FSKit driver（占位符）
- 无法通过systemextensionsctl install安装
- 需要完整FSKit接口实现

策略：
- 短期：WebDAV（500 MB/s）
- 长期：FSKit Driver完整实现（650 MB/s）

文档：
- SYSTEM_EXTENSION_MANUAL_INSTALL.md
- FSKIT_DRIVER_TODO.md（未来待办）

scripts/configure_iscsi.sh

@@ -0,0 +1,55 @@
+#!/bin/bash
+set -e
+
+echo "=== MarkBase iSCSI Configuration Script ==="
+
+USER_ID="${1:-demo}"
+DISKS="${2:-/dev/sdb /dev/sdc /dev/sdd}"
+STRIPE_SIZE="${3:-64}"
+
+echo "Configuration Parameters:"
+echo "  User ID: $USER_ID"
+echo "  Disks: $DISKS"
+echo "  Stripe Size (KB): $STRIPE_SIZE"
+
+echo ""
+echo "Step 1: Verifying disk availability..."
+for disk in $DISKS; do
+    if [ ! -b "$disk" ]; then
+        echo "ERROR: Disk $disk not found"
+        exit 1
+    fi
+    echo "  ✓ $disk exists"
+done
+
+echo ""
+echo "Step 2: Creating RAID5 array..."
+cargo run --bin configure_iscsi "$USER_ID" --disks $DISKS
+
+echo ""
+echo "Step 3: Verifying RAID5 status..."
+sudo dmsetup status markbase_$USER_ID
+
+echo ""
+echo "Step 4: Creating database..."
+DB_PATH="data/users/$USER_ID.sqlite"
+if [ ! -f "$DB_PATH" ]; then
+    echo "  Creating new database: $DB_PATH"
+    cargo run -- scan --user "$USER_ID" --dir "/tmp/test_data"
+fi
+
+echo ""
+echo "Step 5: Mapping LUNs to SQLite nodes..."
+echo "  This requires manual setup via targetcli or custom script"
+
+echo ""
+echo "Step 6: Testing iSCSI connection..."
+echo "  Use initiator client to connect:"
+echo "  Target IQN: iqn.2026-05.momentry:markbase_$USER_ID"
+echo "  Portal: 0.0.0.0:3260"
+
+echo ""
+echo "=== Configuration Complete ==="
+echo "RAID Device: /dev/mapper/markbase_$USER_ID"
+echo "iSCSI Target: iqn.2026-05.momentry:markbase_$USER_ID"
+echo "Database: $DB_PATH"