:rocket: New features * Added input_schema and output_schema definitions to API specifications. * Added invocation with explanation and get model metadata. * Updated API documentation to include ModelListPayload schema with is_explainer and has_explainer attributes. * Added endpoints to list TANGO registry connector and server proxy in Postman collection. * Add input and output schemas to TANGO Model data-model. * Refactored tango model attributes in OpenAPI specification to flatten structure and add 'need_context' property. * Added disclaimer in json format. * Added endpoint to list TANGO server proxy in Postman collection. * Updated changelog to include new list_tangoserverproxy endpoint in OpenAPI and Postman. * Added input and output schema to TANGO API postman collection. * Refactored model attributes in OpenAPI schema for improved clarity. * Added input and output schemas to TANGO Model data-model in OpenAPI specification. * Added endpoints for listing TANGO Registry Connectors and TANGO Server Proxy. * Updated postman collections with API to update session state. * Added patch session state endpoint to public API OpenAPI.