2.2.11

MySQL/PGSQL Toolkits security fix

The tools inside the database related toolkits now ask the model to provide a parametrized query, and a list of parameters so the query can be properly prepared to avoid sql injection.

Fix ObjectProperty constructor

The constructor has a nullable class property but the class_exists check do not accept null raising an exception. The property now check if the class property is properly filled before the calling class_exists.

Fix #300

Update GeminiEmbeddingsProvider

PR #303 from @zliebersbach