feat: add rules for transactions

app/apps/rules/signals.py

@@ -0,0 +1,20 @@
+from django.dispatch import Signal, receiver
+
+from apps.transactions.models import Transaction
+from apps.rules.tasks import check_for_transaction_rules
+
+transaction_created = Signal()
+transaction_updated = Signal()
+
+
+@receiver(transaction_created)
+@receiver(transaction_updated)
+def transaction_changed_receiver(sender: Transaction, signal, **kwargs):
+    check_for_transaction_rules.defer(
+        instance_id=sender.id,
+        signal=(
+            "transaction_created"
+            if signal is transaction_created
+            else "transaction_updated"
+        ),
+    )