功能: 新增 SAP HANA 完整备份支持与 Backint 协议代理 (#37)

* chore: ignore web/dist directory in git repository

* 功能: 新增 SAP HANA 完整备份支持与 Backint 协议代理

- 修复 service 层校验 bug，使 SAP HANA 类型可正常创建
- 增强 hdbsql Runner：支持完整/增量/差异/日志备份、并行通道、失败重试
- 新增 Backint 协议代理（backupx backint 子命令），HANA 原生接口直连 BackupX 存储后端
- 新增本地 SQLite 目录维护 EBID↔对象键映射
- 前端新增 SAP HANA 扩展字段表单（备份类型/级别/通道数/重试次数/实例编号）
- README 中英文补充 SAP HANA 两种模式的使用说明

README_EN.md

@@ -34,7 +34,8 @@
 
 | Capability | Details |
 |-----------|---------|
-| **Backup Types** | Files/Directories (multi-source), MySQL, PostgreSQL, SQLite, SAP HANA |
+| **Backup Types** | Files/Directories (multi-source), MySQL, PostgreSQL, SQLite, SAP HANA (full / incremental / differential / log backups + parallel channels + retry) |
+| **SAP HANA Backint Agent** | Built-in SAP HANA Backint protocol agent — HANA's native backup interface can route data directly to any storage backend supported by BackupX |
 | **70+ Storage Backends** | Built-in Alibaba OSS / Tencent COS / Qiniu / S3 / Google Drive / WebDAV / FTP + 70+ backends via rclone (SFTP, Azure Blob, Dropbox, OneDrive, etc.) |
 | **Scheduling** | Cron-based + visual editor + auto-retention policy (by days/count, auto empty directory cleanup) |
 | **Multi-Node** | Master-Agent cluster for managing backups across multiple servers with remote directory browsing and node editing |
@@ -238,6 +239,82 @@ docker exec -it backupx /app/bin/backupx reset-password --username admin --passw
 
 ---
 
+## SAP HANA Support
+
+BackupX offers two SAP HANA backup modes — pick whichever fits:
+
+### Mode 1: hdbsql Runner (Web-console managed)
+
+Create a SAP HANA backup task in the Web console. The backend runs `hdbsql` to perform backups, suitable for BackupX-scheduled recurring jobs.
+
+**Source configuration supports:**
+
+| Field | Options | Description |
+|-------|---------|-------------|
+| Backup type | `data` / `log` | Data or log backup |
+| Backup level | `full` / `incremental` / `differential` | Auto-disabled for log backups |
+| Parallel channels | `1 ~ 32` | `BACKUP DATA USING FILE ('c1','c2',...)` parallel paths |
+| Retry count | `1 ~ 10` | Exponential backoff (5s × attempt²) |
+| Instance number | Optional | Inferred from port or manually specified |
+
+### Mode 2: Backint Protocol Agent (HANA native)
+
+BackupX ships a built-in Backint Agent. SAP HANA calls it via native `BACKUP DATA USING BACKINT` syntax, and data is routed automatically to BackupX storage targets (S3 / OSS / COS / WebDAV / 70+ backends).
+
+**1. Prepare parameter file** `/opt/backupx/backint_params.ini`:
+
+```ini
+#STORAGE_TYPE = s3
+#STORAGE_CONFIG_JSON = /opt/backupx/storage.json
+#PARALLEL_FACTOR = 4
+#COMPRESS = true
+#KEY_PREFIX = hana-backup
+#CATALOG_DB = /opt/backupx/backint_catalog.db
+#LOG_FILE = /var/log/backupx/backint.log
+```
+
+**2. Prepare storage config** `/opt/backupx/storage.json` (same schema as BackupX storage targets):
+
+```json
+{
+  "endpoint": "https://s3.amazonaws.com",
+  "region": "us-east-1",
+  "bucket": "hana-prod",
+  "accessKeyId": "AKIA...",
+  "secretAccessKey": "..."
+}
+```
+
+**3. Create the hdbbackint symlink:**
+
+```bash
+ln -s /opt/backupx/backupx /usr/sap/<SID>/SYS/global/hdb/opt/hdbbackint
+```
+
+**4. Enable in HANA `global.ini`:**
+
+```ini
+[backup]
+data_backup_using_backint = true
+catalog_backup_using_backint = true
+log_backup_using_backint = true
+data_backup_parameter_file = /opt/backupx/backint_params.ini
+log_backup_parameter_file = /opt/backupx/backint_params.ini
+```
+
+**5. Manual CLI invocation (for troubleshooting):**
+
+```bash
+backupx backint -f backup  -i input.txt -o output.txt -p backint_params.ini
+backupx backint -f restore -i input.txt -o output.txt -p backint_params.ini
+backupx backint -f inquire -i input.txt -o output.txt -p backint_params.ini
+backupx backint -f delete  -i input.txt -o output.txt -p backint_params.ini
+```
+
+The Backint Agent maintains an `EBID ↔ object-key` catalog in a local SQLite DB. All operations follow the SAP HANA Backint protocol (`#PIPE` / `#SAVED` / `#RESTORED` / `#BACKUP` / `#NOTFOUND` / `#DELETED` / `#ERROR`).
+
+---
+
 ## Multi-Node Cluster
 
 BackupX supports Master-Agent mode for managing multiple servers: