Release AzLocal.UpdateManagement v0.9.31

[NeilBird]

Summary

Release AzLocal.UpdateManagement v0.9.31 with fleet-scale authentication, performance, and reporting hardening.

• renew expired GitHub OIDC-backed Azure CLI authentication inside long-running ARM and Resource Graph operations
• query explicit fleets above 200 cluster IDs through bounded represented-subscription batches with exact client-side resource-ID filtering
• keep Monitor: 3 and Update: 4 reporting paths read-only by skipping sideload-tag reset checks
• detect incomplete Monitor: 3 supplementary datasets, preserve available reports, and fail only after evidence is written
• clarify that AZURE_SUBSCRIPTION_ID selects the default Azure CLI context and does not define fleet scope
• update the public README, CHANGELOG, release history, shipped pipeline guides, and all 20 generated workflow pins

Validation

• complete non-live Pester suite: 1,819 passed, 0 failed, 1 skipped
• focused release/version/documentation guards: 43 passed, 0 failed
• PowerShell and YAML diagnostics: clean
• git diff --check: clean
• manifest ReleaseNotes: 9,113 characters, within PSGallery limit
• privacy scan: no customer identifiers, GUID subscription IDs, JWT values, or known customer terms in added lines