Migrate Breweries to a vertical slice (Features.Breweries)

Moves brewery CRUD from the Service.Breweries/Infrastructure.Repository
layered split into a single Features.Breweries project: MediatR
commands/queries replace BreweryService, and the repository moves in
alongside its own controller. Extracts Infrastructure.Sql out of
Infrastructure.Repository (just the generic ADO.NET connection/base-repo
plumbing) since Breweries no longer needs the rest of that project, while
Auth and UserAccount repos still do until their own migration.

Also fixes the API.Core and Infrastructure.Repository.Tests Dockerfiles,
which were restoring against COPY destinations that didn't match the
projects' actual relative paths (silently working only because of the
COPY . . that followed); both now restore against Core.slnx with correctly
nested paths, verified with a real docker build.

web/backend/Features/Features.Breweries/Dtos/BreweryDto.cs

@@ -0,0 +1,89 @@
+namespace Features.Breweries.Dtos;
+
+/// <summary>
+/// Represents the location details of an existing brewery, as returned in <see cref="BreweryDto"/>.
+/// </summary>
+public class BreweryLocationDto
+{
+    /// <summary>
+    /// The unique identifier of the brewery's location record.
+    /// </summary>
+    public Guid BreweryPostLocationId { get; set; }
+
+    /// <summary>
+    /// The unique identifier of the brewery post that this location belongs to.
+    /// </summary>
+    public Guid BreweryPostId { get; set; }
+
+    /// <summary>
+    /// The unique identifier of the city in which the brewery is located.
+    /// </summary>
+    public Guid CityId { get; set; }
+
+    /// <summary>
+    /// The primary street address line of the brewery.
+    /// </summary>
+    public string AddressLine1 { get; set; } = string.Empty;
+
+    /// <summary>
+    /// An optional secondary address line (e.g. suite or unit number).
+    /// </summary>
+    public string? AddressLine2 { get; set; }
+
+    /// <summary>
+    /// The postal/ZIP code of the brewery's address.
+    /// </summary>
+    public string PostalCode { get; set; } = string.Empty;
+
+    /// <summary>
+    /// The optional geographic coordinates of the brewery, in a raw binary representation.
+    /// </summary>
+    public byte[]? Coordinates { get; set; }
+}
+
+/// <summary>
+/// Represents a brewery post as returned by the brewery endpoints, including its metadata and
+/// optional location.
+/// </summary>
+public class BreweryDto
+{
+    /// <summary>
+    /// The unique identifier of the brewery post.
+    /// </summary>
+    public Guid BreweryPostId { get; set; }
+
+    /// <summary>
+    /// The unique identifier of the user account that created the brewery post.
+    /// </summary>
+    public Guid PostedById { get; set; }
+
+    /// <summary>
+    /// The name of the brewery.
+    /// </summary>
+    public string BreweryName { get; set; } = string.Empty;
+
+    /// <summary>
+    /// A description of the brewery.
+    /// </summary>
+    public string Description { get; set; } = string.Empty;
+
+    /// <summary>
+    /// The date and time at which the brewery post was created.
+    /// </summary>
+    public DateTime CreatedAt { get; set; }
+
+    /// <summary>
+    /// The date and time at which the brewery post was last updated, or <c>null</c> if it has never been updated.
+    /// </summary>
+    public DateTime? UpdatedAt { get; set; }
+
+    /// <summary>
+    /// A row-version/concurrency token used to detect conflicting concurrent updates to the brewery post.
+    /// </summary>
+    public byte[]? Timer { get; set; }
+
+    /// <summary>
+    /// The location details of the brewery, or <c>null</c> if no location is associated with it.
+    /// </summary>
+    public BreweryLocationDto? Location { get; set; }
+}