Service access token access to Sourcegraph Analytics

We've added support for service access tokens for Sourcegraph Analytics, enabling admins to programmatically access user-level analytics data without relying on browser-based authentication. These long-lived tokens are tied to individual accounts.sourcegraph.com users and allow customers to pull analytics data into their own systems securely and continuously.

Previously, customers had to manually extract session credentials to automate analytics access - this update eliminates that workaround and supports a more secure, standards-based integration with customer data pipelines.