bug (state): Receipt requirement is counting old receipts

[timoguin]

Current Behavior

After connecting Gmail and a retailer account, the receipt count requirement will be satisfied after the initial scans if there are at least 5 past receipts discovered.

Expected Behavior

The receipt requirement should only be satisfied after 5 NEW receipts, not past receipts discovered during the initial scans.

[ricardobrg]

It happens because we are using the microblink's receipt id to check for duplicity, but it is unique for each scan, not throughout scans.

https://github.com/tiki/apps-receipt-capacitor/blob/b44a20ff19342c76996638ddcfe59025ba7dedda/src/service/store/state/state-receipt.ts#L30-L33

An option to avoid duplicity is to use a hash as unique id, composed by the merchant and date and time of the receipt.

[mike-audi]

this is not a duplicity issue, the duplication is handled separately from the state management.

If we want the state to only reflect 5 new receipts, we need to be using the receipt date time fields (there are 2) to set the optional date field for the state.