Paloma Python SDK: Update Scheduled Jobs to include creator and signer metadata fields

[taariq]

Background

As a Python SDK developer, I want Paloma to add new required creater and signer metatadata to create jobs so that all jobs will have the new required medata.
every message that is to be included within a transaction now comes with a new, required field called metadata, which itself includes two different fields: signers and creator.
Using these new concepts, Paloma now considers the metadata field contents when verifying transaction signatures. It does so by confirming that the transaction contains signatures from:
a) all signers of every message within the transaction
b) ensuring that the message creator is among the set of signers, or at least one of the signers of a message has active feegrant from the message creator
Source: palomachain#1025

Acceptance Criteria
python scheduler function requires an additional new field "metadata" to be set - specifications are here:
https://www.notion.so/volumefi/EPIC-11-14-23-Upgrade-all-bots-due-to-Paloma-v1-10-Pigeon-Operator-Key-Requirements-7679e5ad44224218bd422a908ecc4292?pvs=4#346182b33abb41ac8d1535590acfadd5