AI — pgai Postgres extension 0.7.0

This release enhances the Vectorizer functionality by adding configurable base_url support for OpenAI API. This enables pgai Vectorizer to use all OpenAI-compatible models and APIs via the OpenAI integration simply by changing the base_url. This release also includes public granting of vectorizers, superuser creation on any table, an upgrade to the Ollama client to 0.4.5, a new docker-start command, and various fixes for struct handling, schema qualification, and system package management. See all changes on Github.