Index / add Swedish (swe) to Elasticsearch records mapping

[juanluisrp]

What this does

Adds Swedish (swe) to the Elasticsearch index mapping template records.json.

Swedish is registered as a supported UI language in CatController.js, but it was the only such language with no explicit field definitions in records.json. When the UI was switched to Swedish, facet aggregations ran against langswe fields that Elasticsearch had created through dynamic mapping as text fields. Text fields can't be aggregated, so the request failed with HTTP 400 and the search page displayed an error:

illegal_argument_exception: Text fields are not optimised for operations
that require per-document field data like aggregations and sorting.
Please use a keyword field instead. Alternatively, set fielddata=true
on [tag.langswe].

langswe is now added to every relevant section, mirroring the existing languages:

• keyword for the aggregatable fields and their dynamic templates (organisationName, tag / th_*, any)
• text with the built-in swedish analyzer for the full-text fields (*Object template and any)

This matches how german, danish, italian, spanish, romanian and portuguese are handled (built-in language analyzer; only english/french use custom _rebuilt analyzers).

Verification

Tested against Elasticsearch 8.19:

• Confirmed the built-in swedish analyzer exists and stems/stops correctly.
• A keyword-mapped tag.langswe field aggregates correctly.
• A dynamically-mapped (text) tag.langswe reproduces the reported 400.
• A text field with analyzer: swedish is accepted.

Existing indexes need to be rebuilt for the new mapping to take effect.

Closes #9243