Exclude SALARY and DEPOSITO from agent recent-transactions tool

The 'last N transactions' answer was including salary deposits, which the
user reads as expense activity. Filter income types out at the query level.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

backend/app/agent/tools.py

@@ -118,7 +118,11 @@ def get_recent_transactions(
 ) -> list[dict]:
     """Recent transactions, newest first. Use filters to narrow down. For
     billing-cycle scoped totals prefer get_cycle_summary."""
-    q = select(Transaction)
+    q = select(Transaction).where(
+        Transaction.transaction_type.notin_(
+            [TransactionType.SALARY, TransactionType.DEPOSITO]
+        )
+    )
     if source:
         q = q.where(Transaction.source == TransactionSource(source))
     if category_id is not None: