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/Dtos/CityLocation.cs

@@ -0,0 +1,13 @@
+namespace Features.Locations.Dtos;
+
+/// <summary>
+///     Describes a city's location for resolution by <c>ILocationRepository</c>, including the
+///     state/province and country it belongs to.
+/// </summary>
+public sealed record CityLocation(
+    string CityName,
+    string StateProvinceName,
+    string StateProvinceIsoCode,
+    string CountryName,
+    string CountryIsoCode
+);