✅ Fix pipeline: changed gt&lt to gte&lte and added densify for bounds (month and day test passed)

app/database/methods.py

@@ -8,8 +8,20 @@ async def aggregate_salaries(collection: AsyncIOMotorCollection, dt_from: str, d
         {
             "$match": {
                 "dt": {
-                    "$gt": iso(dt_from),
+                    "$gte": iso(dt_from),
-                    "$lt": iso(dt_upto)
+                    "$lte": iso(dt_upto)
+                }
+            }
+        },
+        {
+            "$densify": {
+                "field": "dt",
+                "range": {
+                    "step": 1,
+                    "unit": group_type,
+                    "bounds": [
+                        iso(dt_from), iso(dt_upto)
+                    ]
                 }
             }
         },