feat(db): implement options pattern for database connection strings chapter 2

[kamilbaczek]

No description provided.

[Copilot]

Pull Request Overview

This PR implements the options pattern for database connection strings across multiple modules in the Fitnet application. It replaces direct configuration access with strongly-typed options classes that provide better type safety and validation.

• Introduces PersistenceOptions classes for each module with required connection string properties
• Updates database modules to use IOptions<T> pattern with validation
• Adds framework references to enable options validation features

Reviewed Changes

Copilot reviewed 22 out of 22 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
ReportsModule.cs (both chapters)	Updated to pass configuration to data access modules
*PersistenceOptions.cs files	New options classes defining connection string configurations
DatabaseModule.cs / DatabaseAccessModule.cs files	Refactored to use options pattern instead of direct configuration access
DatabaseConnectionFactory.cs	Updated to use options instead of IConfiguration
*.csproj files	Added framework references for ASP.NET Core features
Program.cs	Added comment explaining module registration pattern

Comments suppressed due to low confidence (1)

Chapter-2-modules-separation/Src/Reports/Fitnet.Reports/DataAccess/DatabaseConnectionFactory.cs:24

• The DatabaseConnectionFactory is registered as a singleton but maintains mutable state (_connection) without thread synchronization. This could lead to race conditions when multiple threads access Create() simultaneously. Consider adding thread safety mechanisms or changing the registration lifetime.

internal sealed class DatabaseConnectionFactory(IOptions<ReportsPersistenceOptions> persistenceOptions) : IDatabaseConnectionFactory
{
    private NpgsqlConnection? _connection;

    public IDbConnection Create()
    {
        if (_connection is { State: ConnectionState.Open })
        {
            return _connection;
        }

        var connectionString = persistenceOptions.Value.Primary;
        _connection = new NpgsqlConnection(connectionString);
        _connection.Open();

        return _connection;
    }

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}