feat: Implement SQLAlchemy enum helper and normalize enum values in database initialization

tests/scripts/test_init_db.py

@@ -60,7 +60,7 @@ class FakeConnection:
         sql = str(statement).strip()
         lower_sql = sql.lower()
 
-        if lower_sql.startswith("do $$ begin"):
+        if lower_sql.startswith("do $$"):
             match = re.search(r"create type\s+(\w+)\s+as enum", lower_sql)
             if match:
                 self.state.enums.add(match.group(1))
@@ -194,6 +194,18 @@ class FakeConnection:
             self.state.financial_inputs[key] = record
             return FakeResult([])
 
+        if "from pg_enum" in lower_sql and "enumlabel" in lower_sql:
+            type_name_param = params.get("type_name")
+            if type_name_param is None:
+                return FakeResult([])
+            type_name = str(type_name_param)
+            values = init_db.ENUM_DEFINITIONS.get(type_name, [])
+            rows = [SimpleNamespace(enumlabel=value) for value in values]
+            return FakeResult(rows)
+
+        if lower_sql.startswith("alter type") and "rename value" in lower_sql:
+            return FakeResult([])
+
         raise NotImplementedError(
             f"Unhandled SQL during test execution: {sql}")