feat: Implement Phase 3 neighbourhood data model

Add schemas, parsers, loaders, and models for Toronto neighbourhood-centric
data including census profiles, crime statistics, and amenities.

Schemas:
- NeighbourhoodRecord, CensusRecord, CrimeRecord, CrimeType
- AmenityType, AmenityRecord, AmenityCount

Models:
- BridgeCMHCNeighbourhood (zone-to-neighbourhood mapping with weights)
- FactCensus, FactCrime, FactAmenities

Parsers:
- TorontoOpenDataParser (CKAN API for neighbourhoods, census, amenities)
- TorontoPoliceParser (crime rates, MCI data)

Loaders:
- load_census_data, load_crime_data, load_amenities
- build_cmhc_neighbourhood_crosswalk (PostGIS area weights)

Also updates CLAUDE.md with projman plugin workflow documentation.

Closes #53, #54, #55, #56, #57, #58, #59

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

portfolio_app/toronto/schemas/amenities.py

@@ -0,0 +1,60 @@
+"""Pydantic schemas for Toronto amenities data.
+
+Includes schemas for parks, schools, childcare centres, and transit stops.
+"""
+
+from decimal import Decimal
+from enum import Enum
+
+from pydantic import BaseModel, Field
+
+
+class AmenityType(str, Enum):
+    """Types of amenities tracked in the neighbourhood dashboard."""
+
+    PARK = "park"
+    SCHOOL = "school"
+    CHILDCARE = "childcare"
+    TRANSIT_STOP = "transit_stop"
+    LIBRARY = "library"
+    COMMUNITY_CENTRE = "community_centre"
+    HOSPITAL = "hospital"
+
+
+class AmenityRecord(BaseModel):
+    """Amenity location record for a neighbourhood.
+
+    Represents a single amenity (park, school, etc.) with its location
+    and associated neighbourhood.
+    """
+
+    neighbourhood_id: int = Field(
+        ge=1, le=200, description="Neighbourhood ID containing this amenity"
+    )
+    amenity_type: AmenityType = Field(description="Type of amenity")
+    amenity_name: str = Field(max_length=200, description="Name of the amenity")
+    address: str | None = Field(
+        default=None, max_length=300, description="Street address"
+    )
+    latitude: Decimal | None = Field(
+        default=None, ge=-90, le=90, description="Latitude (WGS84)"
+    )
+    longitude: Decimal | None = Field(
+        default=None, ge=-180, le=180, description="Longitude (WGS84)"
+    )
+
+    model_config = {"str_strip_whitespace": True}
+
+
+class AmenityCount(BaseModel):
+    """Aggregated amenity count for a neighbourhood.
+
+    Used for dashboard metrics showing amenity density per neighbourhood.
+    """
+
+    neighbourhood_id: int = Field(ge=1, le=200, description="Neighbourhood ID")
+    amenity_type: AmenityType = Field(description="Type of amenity")
+    count: int = Field(ge=0, description="Number of amenities of this type")
+    year: int = Field(ge=2020, le=2030, description="Year of data snapshot")
+
+    model_config = {"str_strip_whitespace": True}