feat: KPI通用化 — 五档评分/三级分解树/因果链追踪

backend/app/models/__init__.py

@@ -293,6 +293,19 @@ class BscLayerConfig(Base):
     kpi_count_max = Column(Integer, default=5, comment="最多KPI数")
 
 
+class KPIHierarchy(Base):
+    """KPI层级关系 — 公司→部门→个人三级分解"""
+    __tablename__ = "kpi_hierarchy"
+    id = Column(Integer, primary_key=True, index=True)
+    entity_id = Column(Integer, ForeignKey("entities.id"), default=1, comment="企业ID")
+    parent_kpi_id = Column(Integer, ForeignKey("kpi_definitions.id"), nullable=False, comment="上级KPI")
+    child_kpi_id = Column(Integer, ForeignKey("kpi_definitions.id"), nullable=False, comment="下级KPI")
+    level = Column(Integer, default=1, comment="1=公司级 2=部门级 3=个人级")
+    weight = Column(Float, default=1.0, comment="下级对上级的贡献权重（%）")
+    child_name = Column(String(200), nullable=True, comment="下级节点名称（个人或部门名）")
+    created_at = Column(DateTime, server_default=func.now())
+
+
 # 兼容性: P2开发新增的模板API需要的模型
 # KPIDefinition 已存在，KPITemplate映射到同一定义
 KPITemplate = KPIDefinition