fix v2 clip issue

[luke-lombardi]

Summary by cubic

Disable embedded image archive cache for Clip v2 so image pulls always come from the registry, fixing incorrect restore behavior. Also improves cache restore paths and telemetry for clearer diagnostics.

• Bug Fixes

  • Skip embedded image archive cache when ClipVersion2; continue using it for v1.
  • Stop emitting required-content events with an empty kind (ignore instead of defaulting).

• Refactors

  • Split cache metadata lookup and restore; add wait path that restores using fetched metadata.
  • Add cache operation tracing and record detailed lifecycle attrs (hash, size, routing key, results).
  • writeImageArchiveFromContentCache now returns a trace and uses ReadContentIntoWithTrace.
  • Remove RequiredContentKindImageArchive.
  • Pass app config into WorkerRepositoryService via a new constructor argument.

^{Written for commit c00023a. Summary will update on new commits.}