docs: add KMS upgrade plan for operators#705
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Comprehensive guide for upgrading dstack-kms clusters across release boundaries (0.5.4 through kms-v0.5.11 + PR #693), covering: - Cluster requirements and the onboard verification constraint - Known release boundaries and recommended upgrade staircase - Bridge upgrade approach for cross-boundary hops - Pre-flight verification with dstack-mr diagnose - Risks, edge cases, and verifier capability matrix
Incorporate validated operator conclusions for upgrading clusters to KMS 0.6.0 (path matrix, RA-TLS OID break on 0.5.3/0.5.4, Gateway/VMM order, pre-cutover checklist), and warn that the target KMS OS must stay on legacy TDX attestation during onboard because older sources only support legacy verification.
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Adds a comprehensive operator guide for upgrading dstack-kms clusters across release boundaries, including a validated path to KMS 0.6.0.
Covers:
0.5.3/0.5.4 → 0.5.7 → 0.6.0;0.5.6+ → 0.6.0directNo attestation provided)dstack-mr diagnoseDoc:
docs/operations/kms-upgrade-plan.md