feat: 全量功能模块开发与集成测试修复

- 新增后端模块：Alert、APIAsset、Compliance、Lineage、Masking、Risk、SchemaChange、Unstructured、Watermark
- 新增前端模块页面与API接口
- 新增Alembic迁移脚本(002-014)覆盖全量业务表
- 新增测试数据生成脚本与集成测试脚本
- 修复metadata模型JSON类型导入缺失导致启动失败的问题
- 修复前端Alert/APIAsset页面request模块路径错误
- 更新docker-compose与开发计划文档

backend/app/services/lineage_service.py

@@ -0,0 +1,65 @@
+import re
+from typing import List, Optional
+from sqlalchemy.orm import Session
+
+from app.models.lineage import DataLineage
+
+
+def _extract_tables(sql: str) -> List[str]:
+    """Extract table names from SQL using regex (simple heuristic)."""
+    # Normalize SQL
+    sql = re.sub(r"--.*?\n", " ", sql)
+    sql = re.sub(r"/\*.*?\*/", " ", sql, flags=re.DOTALL)
+    sql = sql.lower()
+    tables = set()
+    # FROM / JOIN / INTO
+    for pattern in [r"\bfrom\s+([a-z_][a-z0-9_]*)", r"\bjoin\s+([a-z_][a-z0-9_]*)"]:
+        for m in re.finditer(pattern, sql):
+            tables.add(m.group(1))
+    return sorted(tables)
+
+
+def parse_sql_lineage(db: Session, sql: str, target_table: str) -> List[DataLineage]:
+    """Parse SQL and create lineage records pointing to target_table."""
+    source_tables = _extract_tables(sql)
+    records = []
+    for st in source_tables:
+        if st == target_table:
+            continue
+        existing = db.query(DataLineage).filter(
+            DataLineage.source_table == st,
+            DataLineage.target_table == target_table,
+        ).first()
+        if not existing:
+            rec = DataLineage(
+                source_table=st,
+                target_table=target_table,
+                relation_type="direct",
+                script_content=sql[:2000],
+            )
+            db.add(rec)
+            records.append(rec)
+    db.commit()
+    return records
+
+
+def get_lineage_graph(db: Session, table_name: Optional[str] = None) -> dict:
+    """Build graph data for ECharts."""
+    query = db.query(DataLineage)
+    if table_name:
+        query = query.filter(
+            (DataLineage.source_table == table_name) | (DataLineage.target_table == table_name)
+        )
+    items = query.limit(500).all()
+
+    nodes = {}
+    links = []
+    for item in items:
+        nodes[item.source_table] = {"name": item.source_table, "category": 0}
+        nodes[item.target_table] = {"name": item.target_table, "category": 1}
+        links.append({"source": item.source_table, "target": item.target_table, "value": item.relation_type})
+
+    return {
+        "nodes": list(nodes.values()),
+        "links": links,
+    }