1.15.0

• Add SPOG routing support: parse ?o=<workspaceId> from httpPath and inject x-databricks-org-id on Thrift, telemetry, and feature-flag requests. Expose customHeaders on ConnectionOptions for caller-supplied headers (#391 by @samikshya-db)
• Telemetry: enable by default with feature-flag-controlled priority, and fix final-flush dropping on client.close() due to a close-ordering bug (#327, #391 by @samikshya-db)
• Fix Azure AD OAuth: tenant-aware discovery URL and correct scope resource (#363 by @msrathore-db)
• Fix: use a valid SPDX license identifier in package.json (#389 by @sreekanth-db)