Add aviation and UAE policy templates with tag-based filtering (#21518)
* add aviation and UAE regex patterns (PNR, Skywards, Emirates ID, UAE phone, flight number)
* add aviation safety topics category yaml
* add airline brand protection category yaml
* add UAE cultural sensitivity category yaml
* add UAE anti-discrimination category yaml
* add aviation, UAE, and competitor policy templates + migrate region/type to tags
* sync policy_templates_backup.json
* add /policy/templates/enrich endpoint for LLM competitor discovery
* add enrichPolicyTemplate networking call
* add TemplateParameterModal component
* handle parameterized templates and LLM enrichment in policies index
* replace region/type radio filters with tag sidebar checkboxes
91fd2b4621