v1.0.8

Fixed

• The deployed stack now passes MEMRAIN_UTILITY_MODEL to the container, so
  setting it in .env moves every utility-tier call, not only the ones with a
  per-feature key.
• The agent loop can run on models that keep thinking on, such as Sonnet 5.5.
  Redacted reasoning blocks were stored as JSON and came back as an
  index-keyed object, so the next turn failed with a 400; the ledger now keeps
  their bytes as base64 and restores them on replay.