Add basic dynamodb service

[rowanseymour]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 89.47368% with 2 lines in your changes missing coverage. Please review.

Project coverage is 90.77%. Comparing base (a1147be) to head (4f470e8).

Files	Patch %	Lines
aws/dynamo/service.go	88.88%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #142      +/-   ##
==========================================
- Coverage   91.25%   90.77%   -0.49%     
==========================================
  Files          46       47       +1     
  Lines        1716     1734      +18     
==========================================
+ Hits         1566     1574       +8     
- Misses        105      113       +8     
- Partials       45       47       +2     

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