Add caches

src/Managing.Infrastructure.Database/PostgreSql/PostgreSqlUserRepository.cs

@@ -118,16 +118,38 @@ public class PostgreSqlUserRepository : BaseRepositoryWithLogging, IUserReposito
     {
         return await ExecuteWithLoggingAsync(async () =>
         {
+            // Check cache first for all users
+            var cacheKey = "all_users";
+            var cachedUsers = _cacheService.GetValue<List<User>>(cacheKey);
+            if (cachedUsers != null)
+            {
+                return cachedUsers;
+            }
+
             try
             {
                 await PostgreSqlConnectionHelper.EnsureConnectionOpenAsync(_context);
 
+                // Optimized query with explicit SELECT to avoid loading unnecessary data
                 var userEntities = await _context.Users
                     .AsNoTracking()
+                    .Select(u => new UserEntity
+                    {
+                        Id = u.Id,
+                        Name = u.Name,
+                        AgentName = u.AgentName,
+                        AvatarUrl = u.AvatarUrl,
+                        TelegramChannel = u.TelegramChannel
+                    })
                     .ToListAsync()
                     .ConfigureAwait(false);
 
-                return userEntities.Select(PostgreSqlMappers.Map);
+                var users = userEntities.Select(PostgreSqlMappers.Map).ToList();
+                
+                // Cache all users for 10 minutes since this data changes infrequently
+                _cacheService.SaveValue(cacheKey, users, TimeSpan.FromMinutes(10));
+                
+                return users;
             }
             finally
             {
@@ -182,6 +204,9 @@ public class PostgreSqlUserRepository : BaseRepositoryWithLogging, IUserReposito
                     {
                         _cacheService.SaveValue(newUserAgentCacheKey, user, TimeSpan.FromMinutes(5));
                     }
+                    
+                    // Invalidate all users cache since we added a new user
+                    _cacheService.RemoveValue("all_users");
                     return; // Exit early since we already saved
                 }
 
@@ -204,6 +229,9 @@ public class PostgreSqlUserRepository : BaseRepositoryWithLogging, IUserReposito
                     var newAgentCacheKey = $"user_agent_{user.AgentName}";
                     _cacheService.RemoveValue(newAgentCacheKey);
                 }
+                
+                // Invalidate all users cache since we updated a user
+                _cacheService.RemoveValue("all_users");
             }
             catch (Exception e)
             {