v0.81.1 - User Guides and Storage Workload Access

• Document application access to vStorage from vServer and VKS: dedicated
  identities, bucket grants, private S3 key handoff, rotation, retirement,
  and network prerequisites. See Storage Workload Access.
• Clarify key retirement and ambiguous-create recovery: delete identified
  keys while attached, reconcile uncertain results with known inventory and
  other creators, and preserve unrelated keys and policy grants.
• Improve README and Wiki navigation, put credential prerequisites before
  first-use examples, keep quick starts read-only, and identify SDK server
  counts as one page. Add CDN, Monitor, and current object operations to the
  service overview.
• Correct guidance on secret redaction, Windows file permissions, endpoint
  overrides, and operation-specific retries. Clarify the CLI read-only guard
  and quote checks without implying IAM restrictions or final billing locks.
• This patch changes documentation only. It adds no SDK or CLI operations or
  endpoint APIs.