* Ensure tag operations are case insensitve on insert across database types. * Ensure tags provided in a single property are case insensitively distinct when saving the tags and relationships. * Update src/Umbraco.Infrastructure/Persistence/Repositories/Implement/TagRepository.cs Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> * Handle case sensitivity on insert with tag groups too. --------- Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>