fix: Repair data pipeline with StatCan CMHC rental data

- Add StatCan CMHC parser to fetch rental data from Statistics Canada API
- Create year spine (2014-2025) as time dimension driver instead of census
- Add CMA-level rental and income intermediate models
- Update mart_neighbourhood_overview to use rental years as base
- Fix neighbourhood_service queries to match dbt schema
- Add CMHC data loading to pipeline script

Data now flows correctly: 158 neighbourhoods × 12 years = 1,896 records
Rent data available 2019-2025, crime data 2014-2024

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

CLAUDE.md

@@ -18,7 +18,7 @@ Working context for Claude Code on the Analytics Portfolio project.
 
 ```bash
 make setup          # Install deps, create .env, init pre-commit
-make docker-up      # Start PostgreSQL + PostGIS
+make docker-up      # Start PostgreSQL + PostGIS (auto-detects x86/ARM)
 make docker-down    # Stop containers
 make db-init        # Initialize database schema
 make run            # Start Dash dev server
@@ -193,6 +193,7 @@ notebooks/                   # Data documentation (Phase 6)
 - SQLAlchemy 2.0 + Pydantic 2.0 only (never mix 1.x APIs)
 - PostGIS extension required in database
 - Docker Compose V2 format (no `version` field)
+- **Multi-architecture support**: `make docker-up` auto-detects CPU architecture and uses the appropriate PostGIS image (x86_64: `postgis/postgis`, ARM64: `imresamu/postgis`)
 
 ---