feat: add analysis pages and raster risk map

Ship a new app version with broader analytics, restructured
dashboards, and a server-rendered risk map.

Frontend:
- Add Overview, Demographic, Disease, and Environmental Health
  analysis pages
- Add AnomalyMarkers, CalendarHeatmap, and MetricHeatmapTable
  components
- Rebuild Alerts map onto server-rendered raster risk tiles;
  expand Monitoring, Trend, and District Comparison views
- Extend API client, stores, and TypeScript types

Backend:
- Add environment router (pollutants, lag correlations)
- Add risk_raster util serving XYZ 100m risk tiles
- Expand cases endpoints (demographics, seasonality, diagnoses)
  and insights; harden auth and file-based loaders

Data & tooling:
- Add processed outpatient/inpatient/combined case parquet (LFS)
- Add nested CLAUDE.md guides, pyrightconfig, and test updates

backend/models.py

@@ -2,7 +2,7 @@
 Pydantic models for CBPOA risk assessment API
 Aligned with frontend types from CBPOA/frontend/src/types/index.ts
 """
-from pydantic import BaseModel, Field
+from pydantic import BaseModel, ConfigDict, Field
 from typing import Optional, List, Literal
 from datetime import datetime
 
@@ -280,6 +280,9 @@ class MultiDayPredictionRequest(BaseModel):
 
 class MultiDayPredictionResponse(BaseModel):
     """Response for multi-day grid predictions"""
+    # `model_version` collides with Pydantic's protected `model_` namespace; opt out.
+    model_config = ConfigDict(protected_namespaces=())
+
     predictions: List[GridPrediction] = Field(..., description="Grid predictions")
     total_grids: int = Field(..., description="Total grids predicted")
     date_range: tuple[str, str] = Field(..., description="Prediction date range")