v1.26.2

A patch release fixing two reported metadata bugs: profile language filters
that never applied to what actually got downloaded, and DNB-primary setups
silently importing English OpenLibrary catalogues.

Fixed

• Metadata profile languages now constrain downloads, not just the
  catalogue (#1573, #1576, Discussion #1572) — the profile's
  allowed_languages filtered which books entered the library, but the
  release filter only activated for English-only profiles and the automatic
  grab path never loaded the profile at all, so an ITA/ENG profile still
  grabbed German or French releases whenever one ranked first. The
  foreign-tag list now maps each release marker to its ISO 639-2/B code so
  any profile language set can be checked against a release: tagged with a
  language outside the set drops it, untagged passes (the tag is only ever
  a negative signal). Auto-grab resolves the author's profile before
  grabbing, mirroring the interactive search, with the global
  search.preferredLanguage setting as the fallback. Closes #1573.
• DNB as primary provider now keeps the DNB author identity (#1574,
  #1577) — author search collapses same-name records from multiple
  providers to the most complete one, judged by work and rating counts
  that only OpenLibrary reports, so the dnb: record lost the collapse
  every time even with DNB promoted to primary. The added author kept an
  OpenLibrary foreign ID, and since the catalogue imports from the
  provider the foreign ID names, DNB-primary users got English OL work
  titles — and book searches built from those titles could never match
  German releases. The primary provider's record now wins the collapse
  ahead of the count comparisons; OpenLibrary-primary setups are
  unchanged. Authors already imported under the OL identity can be
  relinked once via Link metadata on the author page. Closes #1574.