Replace ipapi with MaxMind GeoIP2 for geolocation services

[neozhu]

Overview

This PR migrates the geolocation service from free IP lookup APIs (ipapi.co and ip-api.com) to MaxMind GeoIP2 Web Services API for more reliable and accurate IP geolocation lookups.

Changes

• ✅ Added MaxMind.GeoIP2 NuGet package (v5.3.0) to Application project
• ✅ Removed IGeolocationService interface and GeolocationService implementation
• ✅ Updated LoginAuditCreatedEventHandler to use MaxMind WebServiceClient directly
• ✅ Added MaxMind configuration settings (AccountId, LicenseKey, Host) to appsettings.json
• ✅ Updated DependencyInjection to register MaxMind WebServiceClient with HttpClient
• ✅ Updated docker-compose.yml to include MaxMind environment variables
• ✅ Removed dependency on free IP lookup APIs (ipapi.co, ip-api.com)
• ✅ Updated package references (FluentValidation 12.1.0, QuestPDF 2025.7.4, Serilog.Sinks 9.0.2, MudBlazor 8.14.0)

Benefits

• ✨ More accurate and reliable geolocation data
• ⚡ Better performance with MaxMind's dedicated service
• 🔒 Professional-grade IP intelligence
• 🚀 Support for offline databases (future enhancement)

Configuration Required

Before deploying, ensure the following environment variables are set:

• MAXMIND_ACCOUNT_ID: Your MaxMind account ID
• MAXMIND_LICENSE_KEY: Your MaxMind license key

In appsettings.json, configure:

"MaxMind": {
  "AccountId": 0,
  "LicenseKey": "your license key",
  "Host": "geolite.info" // For GeoLite2 free tier
}

Testing

• Tested geolocation lookup with real IP addresses
• Verified error handling for invalid IPs
• Confirmed configuration loading from appsettings.json
• Validated Docker environment variable mapping

Breaking Changes

⚠️ This change requires MaxMind API credentials to be configured. Free tier (GeoLite2) is available.

Files Changed

• src/Application/Application.csproj
• src/Application/Common/Interfaces/IGeolocationService.cs (deleted)
• src/Application/Features/LoginAudits/EventHandlers/LoginAuditCreatedEventHandler.cs
• src/Infrastructure/DependencyInjection.cs
• src/Infrastructure/Infrastructure.csproj
• src/Infrastructure/Services/GeolocationService.cs (deleted)
• src/Server.UI/appsettings.json
• src/Server.UI/Server.UI.csproj
• docker-compose.yml