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/Features/Features.Locations.Tests/Repository/TestConnectionFactory.cs

@@ -0,0 +1,14 @@
+using System.Data.Common;
+using Infrastructure.Sql;
+
+namespace Features.Locations.Tests.Repository;
+
+internal class TestConnectionFactory(DbConnection conn) : ISqlConnectionFactory
+{
+    private readonly DbConnection _conn = conn;
+
+    public DbConnection CreateConnection()
+    {
+        return _conn;
+    }
+}