- scp/ssh now force a fallback to password auth so a missing/rejected
  key fails with a real prompt instead of an opaque "Permission denied
  (publickey)".
- Smoke test now checks each path against its expected status (/404 is
  expected to 404) instead of treating any non-throwing response as a
  pass, and surfaces the actual failure reason.
- The remote IIS server has the 64-bit Access Database Engine, unlike
  the local dev machine, so its app pool stays 64-bit and migrations
  run through the plain (64-bit) cscript.exe instead of SysWOW64.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

- .gitattributes + an explicit allow-list in build-release.ps1 assemble a
  clean release tree (app/, core/, public/, scripts/, db/migrations only) -
  anything not on the allow-list is deleted from the deploy, so a stray
  file added later can't ship to production by accident.
- public/web.config.production.template holds the production appSettings
  (DB path outside the deploy dir, Environment=Production, error logging on).
- deploy-iis.ps1 builds, zips, and scp's a release to the IIS host, then
  runs deploy-iis-remote-apply.ps1 there over ssh to swap in the new files,
  run migrations, and restart the site/app pool - the DB and error log live
  outside the deploy directory so a redeploy never touches them.
- Removed deploy-iis-git.ps1 and migrate_isbusiness_to_households.vbs,
  leftovers from a different template project that didn't apply here.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>