✨ Add data result storage and complete data result tree

[hacheigriega]

✨ Feature

We plan to migrate the data result store from the contract to the batching module.

• Create data result store in the batching module.
• Upon tally completion, a data result entry is created in the store.
• The batching module's data result tree construction will be based on a query of this data result store.
• Once a data result is included in a batch, its status should be updated.
• Add relevant tests. Pay close attention to merkle proof construction and verification with data result tree since it has a unique shape.