Add Agent tracking balance

src/Managing.Application.Abstractions/Repositories/IAgentBalanceRepository.cs

@@ -0,0 +1,12 @@
+using Managing.Domain.Statistics;
+
+namespace Managing.Application.Abstractions.Repositories;
+
+public interface IAgentBalanceRepository
+{
+    void InsertAgentBalance(AgentBalance balance);
+    Task<IList<AgentBalance>> GetAgentBalances(string agentName, DateTime start, DateTime? end = null);
+
+    Task<(IList<AgentBalanceHistory> result, int totalCount)> GetAllAgentBalancesWithHistory(DateTime start,
+        DateTime? end);
+}