Add hide_missing_ids filter to transaction queries

- Add hide_missing_ids parameter to database functions to filter out transactions without internalTransactionId
- Update API routes to support the new filter parameter
- Update unit tests to include the new parameter
- Add opencode.json configuration file

tests/unit/test_api_transactions.py

@@ -166,6 +166,7 @@ class TestTransactionsAPI:
             min_amount=-50.0,
             max_amount=0.0,
             search="Coffee",
+            hide_missing_ids=True,
         )
 
     def test_get_transactions_empty_result(

tests/unit/test_database_service.py

@@ -99,6 +99,7 @@ class TestDatabaseService:
                 min_amount=None,
                 max_amount=None,
                 search=None,
+                hide_missing_ids=True,
             )
 
     async def test_get_transactions_from_db_with_filters(
@@ -129,6 +130,7 @@ class TestDatabaseService:
                 min_amount=-50.0,
                 max_amount=0.0,
                 search="Coffee",
+                hide_missing_ids=True,
             )
 
     async def test_get_transactions_from_db_sqlite_disabled(self, database_service):
@@ -158,7 +160,9 @@ class TestDatabaseService:
             )
 
             assert result == 42
-            mock_get_count.assert_called_once_with(account_id="test-account-123")
+            mock_get_count.assert_called_once_with(
+                account_id="test-account-123", hide_missing_ids=True
+            )
 
     async def test_get_transaction_count_from_db_with_filters(self, database_service):
         """Test getting transaction count with filters."""
@@ -178,6 +182,7 @@ class TestDatabaseService:
                 date_from="2025-09-01",
                 min_amount=-100.0,
                 search="Coffee",
+                hide_missing_ids=True,
             )
 
     async def test_get_transaction_count_from_db_sqlite_disabled(