Update NAR snapshot — expected July 2026

[skfd]

The latest NAR snapshot is 2025-12 (December 2025). Statistics Canada releases NAR roughly every 6 months, so the next snapshot is expected around June–July 2026.

What to do

1. Check the NAR catalogue page for a new release: https://www150.statcan.gc.ca/n1/pub/46-26-0002/462600022022001-eng.htm
2. Add the new snapshot to NAR_SNAPSHOTS in src/config.py:

   "2026-06": {
       "url": "https://www150.statcan.gc.ca/n1/pub/46-26-0002/2022001/202606.zip",
       "reference_date": "2026-06-01",
   },

3. Add the period to NAR_SNAPSHOT_ORDER.
4. Run the pipeline:

   postal-codes refresh --source nar
   postal-codes generate-static

Context

NAR is the primary source. Each new snapshot triggers a diff against the previous one, producing new change events (added, removed, city_changed, csd_changed, location_shifted) that feed into the published output on GitHub Pages.