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/LocationRepositoryTests.cs

@@ -0,0 +1,114 @@
+using Apps72.Dev.Data.DbMocker;
+using Domain.Exceptions;
+using Features.Locations.Dtos;
+using Features.Locations.Repository;
+using FluentAssertions;
+
+namespace Features.Locations.Tests.Repository;
+
+public class LocationRepositoryTests
+{
+    private static readonly CityLocation Location = new(
+        "London",
+        "Ontario",
+        "CA-ON",
+        "Canada",
+        "CA"
+    );
+
+    private static LocationRepository CreateRepo(MockDbConnection conn)
+    {
+        return new LocationRepository(new TestConnectionFactory(conn));
+    }
+
+    // DbMocker's ReturnsScalar(Guid) doesn't round-trip correctly (it returns an unrelated value
+    // instead of the Guid), so every scalar Guid lookup here is faked via a single-row/single-column
+    // ReturnsTable instead -- ExecuteScalar reads a mocked table's first cell correctly.
+    private static MockTable GuidTable(Guid id)
+    {
+        return MockTable.WithColumns(("Value", typeof(Guid))).AddRow(id);
+    }
+
+    [Fact]
+    public async Task GetOrCreateCityIdAsync_ReturnsExistingCityId_WhenFullChainAlreadyExists()
+    {
+        Guid countryId = Guid.NewGuid();
+        Guid stateProvinceId = Guid.NewGuid();
+        Guid cityId = Guid.NewGuid();
+        MockDbConnection conn = new();
+
+        conn.Mocks.When(cmd => cmd.CommandText.Contains("FROM dbo.Country"))
+            .ReturnsTable(GuidTable(countryId));
+        conn.Mocks.When(cmd => cmd.CommandText.Contains("FROM dbo.StateProvince"))
+            .ReturnsTable(GuidTable(stateProvinceId));
+        conn.Mocks.When(cmd => cmd.CommandText.Contains("FROM dbo.City c"))
+            .ReturnsTable(GuidTable(cityId));
+
+        LocationRepository repo = CreateRepo(conn);
+
+        // No INSERT is mocked; if the repository tried to create anything despite the chain
+        // already existing, this would fail with a MockException.
+        Guid result = await repo.GetOrCreateCityIdAsync(Location);
+
+        result.Should().Be(cityId);
+    }
+
+    [Fact]
+    public async Task GetOrCreateCityIdAsync_CreatesFullChain_WhenNothingExists()
+    {
+        Guid countryId = Guid.NewGuid();
+        Guid stateProvinceId = Guid.NewGuid();
+        Guid cityId = Guid.NewGuid();
+        MockDbConnection conn = new();
+
+        // First lookup (before creation) returns no rows; second lookup (after insert) returns the ID.
+        int countryLookups = 0;
+        conn.Mocks.When(cmd => cmd.CommandText.Contains("SELECT CountryID FROM dbo.Country"))
+            .ReturnsTable(_ => ++countryLookups == 1 ? MockTable.Empty() : GuidTable(countryId));
+        conn.Mocks.When(cmd => cmd.CommandText.Contains("SELECT 1 FROM dbo.Country"))
+            .ReturnsTable(MockTable.Empty());
+        conn.Mocks.When(cmd => cmd.CommandText.Contains("INSERT INTO dbo.Country")).ReturnsScalar(1);
+
+        int stateLookups = 0;
+        conn.Mocks.When(cmd => cmd.CommandText.Contains("SELECT StateProvinceID FROM dbo.StateProvince"))
+            .ReturnsTable(_ => ++stateLookups == 1 ? MockTable.Empty() : GuidTable(stateProvinceId));
+        conn.Mocks.When(cmd => cmd.CommandText.Contains("SELECT 1 FROM dbo.StateProvince"))
+            .ReturnsTable(MockTable.Empty());
+        conn.Mocks.When(cmd => cmd.CommandText.Contains("INSERT INTO dbo.StateProvince"))
+            .ReturnsScalar(1);
+
+        int cityLookups = 0;
+        conn.Mocks.When(cmd => cmd.CommandText.Contains("FROM dbo.City c"))
+            .ReturnsTable(_ => ++cityLookups == 1 ? MockTable.Empty() : GuidTable(cityId));
+        conn.Mocks.When(cmd => cmd.CommandText.Contains("SELECT 1 FROM dbo.City"))
+            .ReturnsTable(MockTable.Empty());
+        conn.Mocks.When(cmd => cmd.CommandText.Contains("INSERT INTO dbo.City")).ReturnsScalar(1);
+
+        LocationRepository repo = CreateRepo(conn);
+        Guid result = await repo.GetOrCreateCityIdAsync(Location);
+
+        result.Should().Be(cityId);
+    }
+
+    [Fact]
+    public async Task GetOrCreateCityIdAsync_ThrowsNotFound_WhenCountryMissingForNewStateProvince()
+    {
+        MockDbConnection conn = new();
+
+        // Country never resolves, even after the (mocked) insert -- simulates a race where the
+        // country is missing by the time the state/province lookup runs.
+        conn.Mocks.When(cmd => cmd.CommandText.Contains("SELECT CountryID FROM dbo.Country"))
+            .ReturnsTable(MockTable.Empty());
+        conn.Mocks.When(cmd => cmd.CommandText.Contains("SELECT 1 FROM dbo.Country"))
+            .ReturnsTable(MockTable.Empty());
+        conn.Mocks.When(cmd => cmd.CommandText.Contains("INSERT INTO dbo.Country")).ReturnsScalar(1);
+
+        conn.Mocks.When(cmd => cmd.CommandText.Contains("SELECT StateProvinceID FROM dbo.StateProvince"))
+            .ReturnsTable(MockTable.Empty());
+
+        LocationRepository repo = CreateRepo(conn);
+
+        Func<Task> act = async () => await repo.GetOrCreateCityIdAsync(Location);
+        await act.Should().ThrowAsync<NotFoundException>();
+    }
+}