Use decimal instead of float.

[seeker25]

Fixes error:

unsupported operand type(s) for -: 'decimal.Decimal' and 'float' https://registries.sentry.io/issues/3947202203/?end=2023-02-21T10%3A23%3A06&project=1762954&query=is%3Aunresolved+is%3Afor_review+assigned_or_suggested%3A%5Bme%2C+none%5D&referrer=issue-stream&sort=inbox&start=2022-11-23T10%3A23%3A06&utc=true

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of the sbc-pay license (Apache 2.0).

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

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[codecov]

Codecov Report

Merging #1118 (c7fc634) into main (28ff797) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1118      +/-   ##
==========================================
- Coverage   91.54%   91.52%   -0.02%     
==========================================
  Files         153      162       +9     
  Lines        9842    10625     +783     
==========================================
+ Hits         9010     9725     +715     
- Misses        832      900      +68     

Flag	Coverage Δ
paymentreconciliationsqueue	91.32% <100.00%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pay-api/src/pay_api/resources/account.py	93.40% <ø> (-0.04%)	⬇️
...ons/src/reconciliations/payment_reconciliations.py	91.75% <100.00%> (ø)
...ment-reconciliations/src/reconciliations/config.py	96.38% <0.00%> (ø)
...ent-reconciliations/src/reconciliations/version.py	0.00% <0.00%> (ø)
...iations/src/reconciliations/cgi_reconciliations.py	92.23% <0.00%> (ø)
...ment-reconciliations/src/reconciliations/worker.py	86.84% <0.00%> (ø)
...yment-reconciliations/src/reconciliations/enums.py	100.00% <0.00%> (ø)
...nt-reconciliations/src/reconciliations/__init__.py	100.00% <0.00%> (ø)
...yment-reconciliations/src/reconciliations/minio.py	100.00% <0.00%> (ø)
... and 1 more