fix: persist directory for untranslated listings

[syedgalib]

Summary

• persist the current listing's directory meta and taxonomy relationship even when WPML returns no listing translation group
• continue syncing language-specific directory terms to translated listings
• preserve translated listing assignments when a matching translated directory is unavailable

Root cause

Directorist WPML Integration disables Directorist core's directory taxonomy update through directorist_should_update_directory_type. Its replacement post_updated handler only wrote directory relationships while iterating WPML listing translations. For new or untranslated listings, that collection can be empty, leaving _directory_type meta populated while the atbdp_listing_types relationship is missing.

This was reproduced read-only on the ticket's production site with listings 5705 and 5706: the edit form resolved the saved directory from meta, while the All Listings Directory column was empty because it reads the taxonomy relationship.

Fix

The update handler now persists the current listing before translation lookup. Existing inconsistent listings repair on resave. Translated listings are still mapped to language-specific directory terms, while missing mappings are skipped instead of clearing assignments.

Verification

• php -l app/Controller/Hook/Listings_Actions.php
• composer validate --no-check-publish
• git diff --check
• isolated behavioral harness covering:
  • untranslated listing save
  • translated directory synchronization
  • missing translation preservation
  • repair from stored meta on resave
  • unrelated post-type guard

Ticket

#3137