Replace stored-procedure repositories with Dapper-based repositories

Removes the USP_* stored procedures for Auth, Location, and Brewery
data access in favour of services built with Dapper.

Adds a new Features.Locations slice and optimistic concurrency support
for the Brewery slice.

web/backend/Domain/Domain.Entities/Entities/BreweryPost.cs

@@ -9,6 +9,5 @@ public class BreweryPost
     public DateTime CreatedAt { get; set; }
     public DateTime? UpdatedAt { get; set; }
     public byte[]? Timer { get; set; }
-    public UserAccount PostedBy { get; set; } = null!;
     public BreweryPostLocation? Location { get; set; }
 }