chore: Enhance database debugging setup and expand test mocks for Drizzle queries and Discord API interactions.

shared/modules/dashboard/dashboard.service.test.ts

@@ -7,6 +7,8 @@ const mockLimit = mock();
 // Helper to support the chained calls in getLeaderboards
 const mockChain = {
     from: () => mockChain,
+    leftJoin: () => mockChain,
+    groupBy: () => mockChain,
     orderBy: () => mockChain,
     limit: mockLimit
 };
@@ -75,7 +77,8 @@ describe("dashboardService", () => {
             // First call is topLevels, second is topWealth
             mockLimit
                 .mockResolvedValueOnce(mockTopLevels)
-                .mockResolvedValueOnce(mockTopWealth);
+                .mockResolvedValueOnce(mockTopWealth)
+                .mockResolvedValueOnce(mockTopWealth); // Mock net worth same as wealth for simplicity
 
             const result = await dashboardService.getLeaderboards();
 
@@ -85,7 +88,7 @@ describe("dashboardService", () => {
             expect(result.topWealth[0]!.balance).toBe("1000");
             expect(result.topWealth[0]!.username).toBe("Alice");
             expect(result.topWealth[1]!.balance).toBe("500");
-            expect(mockLimit).toHaveBeenCalledTimes(2);
+            expect(mockLimit).toHaveBeenCalledTimes(3);
         });
 
         test("should handle empty leaderboards", async () => {