fix: include filter_conditions in goal type list query

Bug 3 Fix: filter_conditions was missing from SELECT statement in
list_goal_type_definitions(), preventing edit form from loading
existing filter JSON.

- Added filter_conditions to line 1087
- Now edit form correctly populates filter textarea

backend/routers/goals.py

@@ -1084,7 +1084,7 @@ def list_goal_type_definitions(session: dict = Depends(require_auth)):
             cur.execute("""
                 SELECT id, type_key, label_de, label_en, unit, icon, category,
                        source_table, source_column, aggregation_method,
-                       calculation_formula, description, is_system, is_active,
+                       calculation_formula, filter_conditions, description, is_system, is_active,
                        created_at, updated_at
                 FROM goal_type_definitions
                 WHERE is_active = true