feat: add node coverage and improve investigation presentation

app/mcp/analysis_models.py

@@ -4,7 +4,7 @@ from datetime import datetime, timedelta
 from typing import Annotated, Literal
 from uuid import UUID
 
-from pydantic import Field, model_validator
+from pydantic import BaseModel, ConfigDict, Field, model_validator
 
 from app.mcp.models import Id, StrictInput
 
@@ -19,6 +19,36 @@ class CalculationInput(StrictInput):
     )
 
 
+class NodeCoverageGroup(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+    group_id: Id = Field(max_length=80)
+    title: str = Field(min_length=1, max_length=200)
+    node_ids: list[Id] = Field(min_length=1, max_length=10000)
+
+
+class NodeCoverageInput(CalculationInput):
+    groups: list[NodeCoverageGroup] = Field(min_length=1, max_length=8,
+        description="已核实的模型节点集合；各组为需要比较的业务或空间集合，可重叠，不接受任意坐标")
+    concave_ratio: float = Field(default=0.25, ge=0, le=1, allow_inf_nan=False,
+        description="凹包比例；越接近1越平滑接近凸包，参数只决定示意形状")
+    buffer_m: float = Field(default=25, gt=0, le=1000, allow_inf_nan=False,
+        description="展示缓冲距离，米；不是服务半径或影响距离")
+    split_by_connectivity: bool = Field(default=False, strict=True,
+        description="需要按模型连接分组时设true；地理分布比较默认false，不能据此认定实际供水关系")
+    excluded_link_ids: list[Id] = Field(default_factory=list, max_length=200,
+        description="连通分组时额外视为断开的管段/阀门，例如已有隔离建议中的关阀ID；仅影响绘图分组")
+
+    @model_validator(mode="after")
+    def bounded_groups(self):
+        if len({group.group_id for group in self.groups}) != len(self.groups):
+            raise ValueError("coverage group IDs must be distinct")
+        if len({node for group in self.groups for node in group.node_ids}) > 10000:
+            raise ValueError("coverage supports at most 10000 distinct nodes")
+        if self.excluded_link_ids and not self.split_by_connectivity:
+            raise ValueError("excluded_link_ids requires split_by_connectivity")
+        return self
+
+
 class BurstDetectionInput(CalculationInput):
     target_time: datetime = Field(description="带时区的侦测时刻；读取此前15天同周期压力数据，不是单小时定位")
     sensor_nodes: list[Id] = Field(min_length=5, max_length=20, description="已核实的压力监测节点ID，至少5个完整传感器")