Workbook import phase 1: manifest-driven batch command

Implements the 18.09. strategy's phase 1 on top of the existing single
importer (which stays the one write path):

- new vitec:import-product-workbooks: runs vitec:import-product-workbook
  per manifest entry (in-process sub-command), aggregates a per-file
  report (writes/unchanged/na, URL-mismatch and error flags, details on
  -v or failure) plus a summary; without --apply every run is a dry
  run; --only filters
- migrations/products_xlsx/ now holds working copies of all 100 agency
  workbooks in their category folders (git-ignored) plus the TRACKED
  manifest.json: workbook path -> product slug, family entries mark the
  K-level landing pages (never imported), product null = unresolved.
  Generated from the 18.09. analysis + sitemap column K:
  68 product / 17 family / 15 open
- --init-manifest resolves open entries against the full product table
  (hidden records included): URL segment/filename vs slug, normalized
  title, unique slug prefix; only unambiguous hits are written back
- single command compare is now tolerant of the RTE storage transform
  (whitespace collapse + <p>-wrap simulation), fixing the known
  every-run-WRITE false positive on re-imports

Post-dry-run hardening, applied the same day (69 products, 785 field
writes across two runs, zero errors, verified against the live JSON):

- PROTECTED_FIELDS title/urltitle in the single command: the stored
  module mapping would have overwritten six canonical sitemap-V2
  product titles
- the stored mapping predated the 18.09. defaults and silently dropped
  `highlights` on every product; the single command now merges
  DEFAULT_MAPPING under the stored mapping (defaults as base, stored
  as per-field override)
- known limitation for phase 2: the g: composed fields report WRITE on
  every run (RTE transform alters ul/strong markup beyond the p-wrap
  normalisation) - the change watch must compare against stored
  imported values, not the database

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

packages/vitec/Configuration/TCA/tx_vitec_domain_model_product.php

@@ -23,8 +23,8 @@ return [
         ],
     ],
     'types' => [
-        '1' => ['showitem' => 'title, subtitle, slug, teaser, description, description2, applications, capabilities, highlights, contentelement, contentelementcta, downloads, portfolio, showdatapath, textrelatedproducts, relatedprodukt, solutions,
-                                --div--;Resources, resources, datasheets,
+        '1' => ['showitem' => 'title, subtitle, slug, teaser, description, description2, applications, capabilities, highlights, contentelement, contentelementcta, portfolio, showdatapath, textrelatedproducts, relatedprodukt, solutions,
+                                --div--;Resources, resources, datasheets, downloads,
                                 --div--;SEO, seotitle, urltitle, seometa, keywords, structureddata,
                                 --div--;Images and Videos, heroimage, productimage, ogimage, video, videofile, 
                                 --div--;LLL:EXT:core/Resources/Private/Language/Form/locallang_tabs.xlf:categories, categories,
@@ -174,7 +174,8 @@ return [
         ],             
     'downloads' => [
         'exclude' => true,
-        'label' => 'Downloads',
+        'label' => 'All Downloads (downloads section)',
+        'description' => 'Every file related to this product - feeds the full downloads section of the detail page. Independent of the datasheet CARDS above: a datasheet may appear in both.',
         'config' => [
             'type' => 'select',
             'renderType' => 'selectMultipleSideBySide',
@@ -466,7 +467,7 @@ return [
     'datasheets' => [
         'exclude' => true,
         'label' => 'Datasheets',
-        'description' => 'Download records shown as datasheet cards below the resource cards - same card row, counts towards the carousel rule',
+        'description' => 'Curated download records shown as datasheet CARDS in the resources row (selection + order = card order, counts towards the carousel rule). Independent of "All Downloads" below, which feeds the full downloads section.',
         'config' => [
             'type' => 'select',
             'renderType' => 'selectMultipleSideBySide',