Allow syncing of one or all ballots

[theref]

To review, push this branch to anvil. Start the app. Your index db should be empty, feel free to create some ballots if you wish.

Add this to end of your url #?ballot_id=5bc87a3cd30becc542c3a39137f4f632 - it's a ballot i created earlier. It should then populate your index db and the title of the ballot is "new test"

Closes #62

[meatballs]

I get an error within an alert - so the app logic is probably ok but I'm not sure what's happening:

ExternalError: Error: call revert exception [ See: https://links.ethers.org/v5-errors-CALL_EXCEPTION ] (method="getBallot(string)", data="0x", errorArgs=null, errorName=null, errorSignature=null, reason=null, code=CALL_EXCEPTION, version=abi/5.7.0) on line 88

[what-the-diff[bot]]

PR Summary

• Enhanced Ballot Handling in Client Code Changes have been made in client_code/forms/routes/ballot/Index/__init__.py to better handle instances when a requested ballot does not exist. This is achieved by adding the session.sync_ballot function in the show_ballot method.

• Modification of the Ballot Class The client_code/model.py file underwent several modifications, notably the relocation of the protocol_version attribute towards the end of the parameters list in the Ballot class's __init__ method. The addition of two new methods, __eq__ and __hash__, also enhance this class's functionality.

• Improvements to the Services Manager The client_code/services/manager.py file received changes, including updating the address variable with a new value and incorporating a new ABI function, getBallot. This function serves to gather information about a specific ballot.

• Upgrades in Storage Services A new method, get_ballot, was added to the ScrollStore class within client_code/services/storage.py. This method's purpose is to fetch a specific ballot from the contract.

• Session Updates for Synchronization The client_code/session.py file now hosts two new synchronization functions: sync_storage and sync_ballot. The former syncs the local store with the scroll store by saving the missing ballots from the scroll store, and the latter syncs a particular ballot from the scroll store to the local store.

• Addition of a Ballot Retrieval Function in Ballot Manager Contract Inside contracts/BallotManager.sol, a new function getBallot was added, enabling the retrieval of specific ballot details using its UUID.