* fix(router.py): support reusable credentials via passthrough router
enables reusable vertex credentials to be used in passthrough
* test: fix test
* test(test_router_adding_deployments.py): add unit testing
* add initial test for assembly ai
* start using PassthroughEndpointRouter
* migrate to lllm passthrough endpoints
* add assembly ai as a known provider
* fix PassthroughEndpointRouter
* fix set_pass_through_credentials
* working EU request to assembly ai pass through endpoint
* add e2e test assembly
* test_assemblyai_routes_with_bad_api_key
* clean up pass through endpoint router
* e2e testing for assembly ai pass through
* test assembly ai e2e testing
* delete assembly ai models
* fix code quality
* ui working assembly ai api base flow
* fix install assembly ai
* update model call details with kwargs for pass through logging
* fix tracking assembly ai model in response
* _handle_assemblyai_passthrough_logging
* fix test_initialize_deployment_for_pass_through_unsupported_provider
* TestPassthroughEndpointRouter
* _get_assembly_transcript
* fix assembly ai pt logging tests
* fix assemblyai_proxy_route
* fix _get_assembly_region_from_url