Replication timing expectations section

### Request Type

Undocumented existing feature

### What needs to be documented?

Have we considered adding a section to the [Replication docs](https://docs.harperdb.io/docs/developers/replication) talking about what customers should expect regarding replication latency and the variables that can effect those timings? Having a section in the docs that we can consistently refer folks to will continue to become more valuable as folks continue leveraging our platform for mission critical workloads.

### Where should this be documented?

_No response_

### Why is this needed?

_No response_

### Existing information

_No response_

### Priority/Impact

Medium - important but not urgent

### Are you planning to fix this issue?

No, just reporting the issue

### First-time contributor support

- [ ] I'm new to contributing and would appreciate guidance on the process
- [ ] I'd like help understanding the project structure
- [ ] I need assistance with setting up the development environment
- [ ] I'm comfortable contributing but new to this project specifically