PCSM_deployment_architecture

[rasika-chivate]

Add Architecture Deployment Examples for PCSM (Source, Destination, and Isolated Node Scenarios).

https://www.notion.so/percona/Percona-ClusterSync-for-MongoDB-Deployment-architecture-2c4674d091f38091a9f1fe4eaebb32b6

[Copilot]

Pull request overview

This PR adds comprehensive deployment architecture documentation for Percona ClusterSync for MongoDB (PCSM), describing three deployment scenarios and their trade-offs. The documentation helps users choose the appropriate deployment model based on their infrastructure requirements and risk tolerance.

Key changes:

• New architecture documentation covering dedicated host, target node co-located, and source node co-located deployment models
• Comparison tables with pros/cons for each architecture
• Guidance on selecting the right deployment model with use cases

Reviewed changes

Copilot reviewed 2 out of 8 changed files in this pull request and generated 3 comments.

File	Description
mkdocs-base.yml	Adds navigation entry for the new deployment architecture documentation
docs/architecture.md	Introduces complete deployment architecture guide with three scenarios, comparison tables, and use case examples

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[inelpandzic]

Again, maybe it is just me, but I think I would like to have like simpler, more modern, diagrams here. @rasika-chivate something like you shared with me on slack is what I mean.

But @radoslawszulgo give your final opinion, I don't want my suggestion to be a blocker or something.