SEO record links; story markets repair; story page titles

Kev's keyword CSV and TYPO3 hold the same solutions under slightly
different names, so the structure check filed them as missing/extra.
Matching is now slug -> normalized title -> record alias, using the
per-model alias store the import tabs got on 2026-08-18
(tx_vitec_import_mapping.record_aliases, key = lowercased CSV name).
One link therefore serves the import union list, the structure check
and vitec:create-markets (same service - linked rows are no longer
proposed as new records).

- every "Missing in TYPO3" row carries a select of all records the
  direct match did not claim; "Save record links" persists per model
- alias-matched rows show under "Both" with a "linked" badge and the
  same select; option 0 removes the link
- SeoResearchService::recordsCheck() additionally returns `linkable`
  (the select options) and flags alias matches with via=link
- new backend POST route seo_aliases

Success stories: --markets-only repair mode
- /success-stories emitted empty `markets` for all 48 stories - a data
  problem (code and TCA untouched since 17.08.); read-only diagnosis
  script migrations/check_usecase_markets.php added
- vitec:import-success-stories --markets-only re-derives each story's
  industries from the export exactly like the full import and rewrites
  ONLY the markets MM relation of the existing record via DataHandler;
  nothing else is touched, no usecase created or deleted, unresolved
  stories keep their current relations
- decision: industries are translated onto the nine main markets of
  the current taxonomy (INDUSTRY_TO_MARKET) instead of recreating the
  seven deleted industry markets; the repair mode never creates
  market records (root cause: those industry markets were deleted
  after the 07.08. taxonomy import, orphaning all story relations)
- ensureMarkets() gained a $create flag for reuse by the full import

Story detail pages: real page title
- every story page answered with the generic page title "Story"; same
  defect and same fix as the product pages on 21.08.: new
  UsecasePageTitleProvider (singleton), registered as vitecUsecase in
  config.pageTitleProviders, fed from UsecaseShowJsonRenderer with
  seo_title falling back to title

Requires on the server:
    vendor/bin/typo3 cache:flush

packages/vitec/Configuration/Backend/Modules.php

@@ -35,6 +35,10 @@ return [
                 'target' => ImportController::class . '::seoUploadAction',
                 'methods' => ['POST'],
             ],
+            'seo_aliases' => [
+                'target' => ImportController::class . '::seoAliasesAction',
+                'methods' => ['POST'],
+            ],
             'products' => [
                 'target' => ProductTextImportController::class . '::productsAction',
             ],

packages/vitec/Configuration/Sets/Vitecset/setup.typoscript

@@ -7,6 +7,11 @@ config {
       before = record
       before = seo
     }
+    vitecUsecase {
+      provider = Evomedien\Vitec\PageTitle\UsecasePageTitleProvider
+      before = record
+      before = seo
+    }
   }
 }