Introspect OAuth token

Checks the validity and status of an OAuth access token. This endpoint allows AI agents to verify if a token is still valid and active.

Token Statuses:

• active: Token is valid and can be used
• revoked: Token has been revoked by the client
• disconnected: User disconnected from the Reload portal
• not_found: Token does not exist
• expired: Token has expired (rare for long-lived tokens)

Authentication Required:

• Client Credentials (Basic Auth) only
• No OAuth token required