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/models/compliance.py

@@ -0,0 +1,33 @@
+from datetime import datetime
+from sqlalchemy import Column, Integer, String, Text, DateTime, Boolean, JSON
+from app.core.database import Base
+
+
+class ComplianceRule(Base):
+    __tablename__ = "compliance_rule"
+
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String(200), nullable=False)
+    standard = Column(String(50), nullable=False)  # dengbao, pipl, gdpr
+    description = Column(Text)
+    check_logic = Column(String(50), nullable=False)  # check_masking, check_encryption, check_audit, check_level
+    severity = Column(String(20), default="medium")  # low, medium, high, critical
+    is_active = Column(Boolean, default=True)
+    created_at = Column(DateTime, default=datetime.utcnow)
+
+
+class ComplianceIssue(Base):
+    __tablename__ = "compliance_issue"
+
+    id = Column(Integer, primary_key=True, index=True)
+    rule_id = Column(Integer, nullable=False)
+    project_id = Column(Integer, nullable=True)
+    entity_type = Column(String(20), nullable=False)  # project, source, column
+    entity_id = Column(Integer, nullable=False)
+    entity_name = Column(String(200))
+    severity = Column(String(20), default="medium")
+    description = Column(Text)
+    suggestion = Column(Text)
+    status = Column(String(20), default="open")  # open, resolved, ignored
+    resolved_at = Column(DateTime, nullable=True)
+    created_at = Column(DateTime, default=datetime.utcnow)