Document minimum required Oracle permissions for ADS's Extension for Oracle

Author: nahk-ivanov

docs/azure-data-studio/quickstart-oracle.md

@@ -39,6 +39,9 @@ To complete this quickstart, you need Azure Data Studio and access to Oracle dat
 
    ![New Connection Screen](./media/quickstart-oracle/new-connection-screen.png)
 
+   > [!NOTE]
+   > Make sure that the Oracle database user used to connect has permissions to enumerate and access objects you are planning to explore. At least `CONNECT` and `SELECT ANY DICTIONARY` permissions should be granted to the connecting user.
+
 4. Click **Connect** to establish the connection.
 
 ## Explore database objects