Add a way to disable PPAF orchestrated availability strategy through account property

[jeet1995]

Summary

Add a mechanism to disable per-partition-automatic-failover (PPAF) orchestrated availability strategy through an account-level property.

Details

• Introduce an account property that controls whether PPAF orchestrated availability strategy is enabled or disabled
• When the account property indicates PPAF should be disabled, the SDK should not apply PPAF orchestration
• This provides operators with a control plane mechanism to opt out of PPAF behavior without SDK code changes

Motivation

Allows account-level control over PPAF behavior for scenarios where the orchestrated availability strategy is not desired.