Fix json serialization + preloaded candle

src/Managing.Api/Controllers/DataController.cs

@@ -568,26 +568,12 @@ public class DataController : ControllerBase
     /// <param name="endDate">Optional end date for the balance history (defaults to current time)</param>
     /// <returns>A list of agent balances within the specified date range</returns>
     [HttpGet("GetAgentBalances")]
-    public async Task<ActionResult<IList<AgentBalance>>> GetAgentBalances(
+    public async Task<ActionResult<AgentBalanceHistory>> GetAgentBalances(
         string agentName,
         DateTime startDate,
         DateTime? endDate = null)
     {
-        string cacheKey = $"AgentBalances_{agentName}_{startDate:yyyyMMdd}_{endDate?.ToString("yyyyMMdd") ?? "now"}";
-
-        // Check if the balances are already cached
-        var cachedBalances = _cacheService.GetValue<IList<AgentBalance>>(cacheKey);
-
-        if (cachedBalances != null)
-        {
-            return Ok(cachedBalances);
-        }
-
         var balances = await _statisticService.GetAgentBalances(agentName, startDate, endDate);
-
-        // Cache the results for 5 minutes
-        _cacheService.SaveValue(cacheKey, balances, TimeSpan.FromMinutes(5));
-
         return Ok(balances);
     }