feat: implement RadiusService for guest user management and authentication configurations

radiuscontroller/Services/RadiusService.cs

@@ -164,13 +164,13 @@ public class RadiusService : IRadiusService
 
     public async Task<List<UserUsageDto>> GetAllUsersWithUsageAsync()
     {
-        var profiles = await _db.GuestProfiles.OrderByDescending(p => p.CreatedAt).ToListAsync();
-        var passwords = await _db.RadCheck
+        var profiles = await _db.GuestProfiles.AsNoTracking().OrderByDescending(p => p.CreatedAt).ToListAsync();
+        var passwords = await _db.RadCheck.AsNoTracking()
             .Where(rc => rc.Attribute == "Cleartext-Password")
             .ToDictionaryAsync(rc => rc.Username, rc => rc.Value);
 
         // Group accounting data by username (for session time and connection status)
-        var acctStats = await _db.RadAcct
+        var acctStats = await _db.RadAcct.AsNoTracking()
             .GroupBy(ra => ra.Username)
             .Select(g => new
             {
@@ -181,7 +181,7 @@ public class RadiusService : IRadiusService
             .ToDictionaryAsync(g => g.Username);
 
         // Fetch data usage from the new dedicated table
-        var dataUsage = await _db.GuestDataUsage.ToDictionaryAsync(du => du.Username);
+        var dataUsage = await _db.GuestDataUsage.AsNoTracking().ToDictionaryAsync(du => du.Username);
 
         var result = new List<UserUsageDto>();
 
@@ -213,7 +213,7 @@ public class RadiusService : IRadiusService
 
     public async Task<List<RadAcct>> GetActiveSessionsAsync()
     {
-        return await _db.RadAcct
+        return await _db.RadAcct.AsNoTracking()
             .Where(ra => ra.AcctStopTime == null)
             .OrderByDescending(ra => ra.AcctStartTime)
             .ToListAsync();