feat: Add scheduler for daily user credits recharge

app/models/credit_action.py

@@ -13,6 +13,7 @@ class CreditActionType(str, Enum):
     SOUND_NORMALIZATION = "sound_normalization"
     API_REQUEST = "api_request"
     PLAYLIST_CREATION = "playlist_creation"
+    DAILY_RECHARGE = "daily_recharge"
 
 
 class CreditAction:
@@ -92,6 +93,12 @@ CREDIT_ACTIONS = {
         description="Create a new playlist",
         requires_success=True,
     ),
+    CreditActionType.DAILY_RECHARGE: CreditAction(
+        action_type=CreditActionType.DAILY_RECHARGE,
+        cost=0,  # This is a credit addition, not deduction
+        description="Daily credit recharge",
+        requires_success=True,
+    ),
 }