Guard partition-level primary tracking orchestrated through reads with a system property

## Summary

Guard partition-level primary tracking orchestrated through reads with a system property for controlled rollout.

## Details

- Add a system property (e.g., feature flag) that gates the partition-level primary tracking behavior orchestrated through reads
- When the system property is disabled, the partition-level primary tracking through reads should be inactive
- This provides a safe rollout mechanism to enable/disable the feature without code changes

## Motivation

Enables staged rollout and quick disable of partition-level primary tracking through reads, reducing risk during feature deployment.