logger identifier for the schema version

[dotansimha]

Related:

include schema version id as a header for CDN responses · Issue #7156 · graphql-hive/console

[kamilkisiela]

The idea here is to correlate logs (e.g. requests, plans) with a schema version via schema_version (or similar) span attribute.

[n1ru4l]

The x-hive-schema-version-id header is now available via the Hive CDN see graphql-hive/console#7397