add parse_audience to all taxila scrapers

[mikesndrs]

Summary of changes
Target audience missing for some Taxila scrapers

Checklist

• I have read and followed the CONTRIBUTING guide.
• I confirm that I have the authority necessary to make this contribution on behalf of its copyright owner and agree
  to license it to the TeSS codebase under the
  BSD license.

[fbacall]

Can you add some tests for the auto_parse_vars feature?

[Copilot]

Pull request overview

This PR introduces a config-driven “auto-parse from description” mechanism (via JSON mapping files) intended to populate fields like target_audience/keywords during ingestion, and removes the per-scraper parse_audience(...) assignments from the Taxila ingestors.

Changes:

• Add feature.auto_parse_vars and JSON mapping files to auto-populate selected fields from description.
• Apply auto-parsing during add_event / add_material.
• Remove explicit target_audience parsing lines from multiple Taxila scrapers and add a unit test for the new behavior.

Reviewed changes

Copilot reviewed 24 out of 24 changed files in this pull request and generated 26 comments.

Show a summary per file

File	Description
test/unit/ingestors/ingestor_test.rb	Adds tests for the new auto_parse_vars ingestion behavior.
lib/ingestors/taxila/wur_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/taxila/uva_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/taxila/uu_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/taxila/utwente_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/taxila/tdcc_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/taxila/surf_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/taxila/rug_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/taxila/rdnl_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/taxila/oscm_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/taxila/oscd_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/taxila/odissei_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/taxila/nwo_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/taxila/maastricht_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/taxila/leiden_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/taxila/lcrdm_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/taxila/han_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/taxila/dtls_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/taxila/dans_ingestor.rb	Removes explicit target_audience assignment (now relying on auto-parse).
lib/ingestors/material_ingestion.rb	Adds auto-parsing for materials (currently contains a breaking variable reference).
lib/ingestors/event_ingestion.rb	Adds auto-parsing for events and replaces the previous parse_audience method.
lib/ingestors/auto_parser_mappings/target_audience.json	Adds keyword-to-audience-category mappings for auto-parsing.
lib/ingestors/auto_parser_mappings/keywords.json	Adds keyword-to-keyword-category mappings for auto-parsing.
config/tess.example.yml	Documents new feature.auto_parse_vars configuration option.

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