Build a Help Desk sample on Polecat + Wolverine

[jeremydmiller]

Build a Help Desk sample application on Polecat + Wolverine, as the SQL Server counterpart to the Marten + Wolverine version.

Why

A Help Desk application is a good showcase for event sourcing — a genuinely stateful entity with a rich lifecycle, projections that people can recognise, and natural concurrency concerns. Having the same application implemented on both Marten (PostgreSQL) and Polecat (SQL Server) makes the store-level differences legible without changing the domain, which is far more instructive than two unrelated samples.

What it should cover

Mirror the Marten + Wolverine version as closely as the two stores allow:

• the same event sourced Incident aggregate and lifecycle
• the same projection set — single stream for details, multi stream with a custom grouper for the per-customer summary
• inline and async projections side by side
• optimistic concurrency through the HTTP layer
• Wolverine for command handling and messaging
• Alba based integration tests

Where the two genuinely diverge, that divergence is the interesting part and worth calling out in the README rather than papering over.

Context

Marten's own in-tree Helpdesk sample was retired in marten#5069, and Marten's docs now point here for end to end samples.

Pairs with the Marten + Wolverine version of the same application.