Init session for the user

| Feature Flag | Default Value |
|---|---|
| createDataInPeaka | true |
| queries | true |
| tables | true |
| caching | true |
| metadata | true |
| aiAgent | true |
| queryHistory | true |
featureFlags object of the request body.
Use the Authorization header with the value 'Bearer
Session Initialization Request
The project ID.
The theme to be used.
The session mode, determining the type of session to be initialized.
CONNECTOR_MODAL_ONLY, FULL_STUDIO Flag indicating whether the theme should be overridden.
The timeout duration in seconds.