Product banners and photos: vitec:import-product-images

- new command attaching the agency asset delivery (one Dropbox folder
  per product) to the product records: files containing "banner" go to
  heroimage (first reference reused/swapped), every other jpg/png -
  carousel subfolders included - is APPENDED to productimage with the
  full reference list, so the live-site images from 2026-09-04 stay
- folder -> record matching: normalised title, title without the
  parenthetical, slug, then IMAGE_ALIASES (Joe's "+1" Vision folder
  names map onto the existing records - their banner files still carry
  the old product names; 95-Series -> avedia-end-points)
- uploads land in fileadmin/product_import/<slug>/ with REPLACE, so
  re-runs are idempotent; inbox migrations/product_images_in/ gitignored
- applied: 39 banners + 14 photos across 42 products, 0 errors,
  live-verified (srcset/webp processing included)
- the "MGW Diamond (SDI encoder)" Dropbox folder held the OG blade's
  banner (image inspected): moved to the OG product in the inbox, the
  appliance deliberately keeps no hero; the Dropbox source still has it
  in the wrong folder
- still without records: MGW Diamond/Pico/Pico+ TOUGH and X-View - their
  assets wait in the inbox, a re-run attaches them once records exist

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

.gitignore

@@ -134,3 +134,4 @@ migrations/products_xlsx/*
 migrations/submarkets_xlsx_in/*
 migrations/subsolutions_xlsx_in/*
 migrations/solutiongroups_xlsx_in/*
+migrations/product_images_in/