Migrate Auth/Brewery/Location repositories to pure Dapper; rename Timer to RowVersion (#237)

* Integrate Spectre.Console into seed application, use async data loading

* 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.

* Add new documentation for Dapper migration/database schema

* Update FluentAssertions to most recent open source ver

* Update XML doc comment in backend projects

* Modify brewery location dto to include denormalized data

* - Updated column names from 'Timer' to 'RowVersion' in schema.sql for
- Introduced new BeerPost entity and updated BreweryPost and BreweryPostLocation entities to use 'RowVersion' for concurrency.
- Modified UserAccount, UserCredential, UserVerification, City, StateProvince, and Country entities to use 'RowVersion' instead of 'Timer'.
- Updated tests and command handlers to reflect changes in concurrency token from 'Timer' to 'RowVersion'.
- Adjusted BreweryDto and BreweryDtoMapper to include 'RowVersion' and updated mapping logic accordingly.
- Ensured all repository methods and interfaces are aligned with the new concurrency handling approach.

* updates

* Add BeerStyle entity and related properties; refactor BreweryDto to remove BeerPosts

* Fix Api.Specs test failures: stale Timer column refs and missing test.user fixture

* Remove repository tests, usages of registration dto used in repo

* archive old stored procs/functions

* update stale docs

* Add instructions for generating cryptographically secure base64 secrets on macOS/Linux and Windows

web/backend/Features/Features.Auth/Commands/Login/LoginHandler.cs

@@ -0,0 +1,43 @@
+using Domain.Entities;
+using Domain.Exceptions;
+using Features.Auth.Dtos;
+using Features.Auth.Repository;
+using Features.Auth.Services;
+using Infrastructure.PasswordHashing;
+using MediatR;
+
+namespace Features.Auth.Commands.Login;
+
+/// <summary>
+///     Handles <see cref="LoginCommand" /> by verifying credentials and issuing access/refresh tokens.
+/// </summary>
+public class LoginHandler(
+    IAuthRepository authRepo,
+    IPasswordInfrastructure passwordInfrastructure,
+    ITokenService tokenService
+) : IRequestHandler<LoginCommand, LoginPayload>
+{
+    /// <exception cref="UnauthorizedException">
+    ///     Thrown when the username does not match any account, the account has no active credential,
+    ///     or the supplied password does not match the stored hash.
+    /// </exception>
+    public async Task<LoginPayload> Handle(LoginCommand request, CancellationToken cancellationToken)
+    {
+        UserAccount user =
+            await authRepo.GetUserByUsernameAsync(request.Username)
+            ?? throw new UnauthorizedException("Invalid username or password.");
+
+        // @todo handle expired passwords
+        UserCredential activeCred =
+            await authRepo.GetActiveCredentialByUserAccountIdAsync(user.UserAccountId)
+            ?? throw new UnauthorizedException("Invalid username or password.");
+
+        if (!passwordInfrastructure.Verify(request.Password, activeCred.Hash))
+            throw new UnauthorizedException("Invalid username or password.");
+
+        string accessToken = tokenService.GenerateAccessToken(user);
+        string refreshToken = tokenService.GenerateRefreshToken(user);
+
+        return new LoginPayload(user.UserAccountId, user.Username, refreshToken, accessToken);
+    }
+}