Explain advanced data consistency strategies in eventual consistency systems in PHP microservices.

Eventual consistency ensures distributed systems converge to a consistent state over time using asynchronous replication and reconciliation.

In distributed PHP microservices, strong consistency is often impractical due to latency and partition tolerance requirements.

Eventual consistency models:

Updates propagate later.

Services update via events.

Fix inconsistencies during reads.

Background reconciliation.

Challenges: