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/alembic/versions/005_add_incremental_meta.py

@@ -0,0 +1,33 @@
+"""Add incremental scan fields to meta tables
+
+Revision ID: 005
+Revises: 004
+Create Date: 2026-04-23 16:00:00.000000
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision: str = "005"
+down_revision: Union[str, None] = "004"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    for table in ["meta_database", "meta_table", "meta_column"]:
+        op.add_column(table, sa.Column("last_scanned_at", sa.DateTime(), nullable=True))
+        op.add_column(table, sa.Column("checksum", sa.String(64), nullable=True))
+        op.add_column(table, sa.Column("is_deleted", sa.Boolean(), nullable=False, server_default=sa.text("false")))
+        op.add_column(table, sa.Column("deleted_at", sa.DateTime(), nullable=True))
+
+
+def downgrade() -> None:
+    for table in ["meta_database", "meta_table", "meta_column"]:
+        op.drop_column(table, "deleted_at")
+        op.drop_column(table, "is_deleted")
+        op.drop_column(table, "checksum")
+        op.drop_column(table, "last_scanned_at")