[Draft] feat(api): add support for AppSync filter attributeExists

[5d]

Issue #

Description

• refactor QueryPredicateOperation to enum
• add support for AppSync filter attributeExists

General Checklist

• Added new tests to cover change, if needed
• Build succeeds with all target using Swift Package Manager
• All unit tests pass
• All integration tests pass
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)
• Documentation update for the change if required
• PR title conforms to conventional commit style
• New or updated tests include Given When Then inline code documentation and are named accordingly testThing_condition_expectation()
• If breaking change, documentation/changelog update with migration instructions

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 51.10294% with 133 lines in your changes are missing coverage. Please review.

Project coverage is 68.17%. Comparing base (9f8e690) to head (19e7d18).
Report is 3 commits behind head on main.

Files	Patch %	Lines
...ries/DataStore/Query/QueryPredicateOperation.swift	30.30%	46 Missing ⚠️
...egories/DataStore/Model/Internal/Persistable.swift	8.33%	33 Missing ⚠️
...mplify/Categories/DataStore/Query/QueryField.swift	12.50%	21 Missing ⚠️
...ify/Categories/DataStore/Query/QueryOperator.swift	0.00%	12 Missing ⚠️
...Plugin/Storage/SQLite/SQLStatement+Condition.swift	87.50%	9 Missing ⚠️
...ources/AWSAPIPlugin/Core/AppSyncListProvider.swift	0.00%	4 Missing ⚠️
...WSDataStorePlugin/Core/DataStoreListProvider.swift	25.00%	3 Missing ⚠️
...ePlugin/Storage/SQLite/QueryPredicate+SQLite.swift	66.66%	2 Missing ⚠️
...ries/DataStore/Query/QueryOperator+Equatable.swift	50.00%	1 Missing ⚠️
...ies/DataStore/Query/QueryPredicate+Equatable.swift	0.00%	1 Missing ⚠️
... and 1 more

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3563      +/-   ##
==========================================
- Coverage   68.22%   68.17%   -0.05%     
==========================================
  Files        1077     1077              
  Lines       36294    36347      +53     
==========================================
+ Hits        24761    24779      +18     
- Misses      11533    11568      +35     

Flag	Coverage Δ
API_plugin_unit_test	67.55% <0.00%> (+0.04%)	⬆️
AWSPluginsCore	67.10% <100.00%> (+0.20%)	⬆️
Amplify	47.87% <19.14%> (-0.23%)	⬇️
Analytics_plugin_unit_test	81.16% <ø> (ø)
Auth_plugin_unit_test	79.02% <ø> (+0.02%)	⬆️
CoreMLPredictions_plugin_unit_test	59.44% <ø> (ø)
DataStore_plugin_unit_test	81.21% <85.71%> (-0.14%)	⬇️
Geo_plugin_unit_test	70.75% <ø> (ø)
Logging_plugin_unit_test	62.87% <ø> (ø)
Predictions_plugin_unit_test	37.10% <ø> (ø)
PushNotifications_plugin_unit_test	87.13% <ø> (ø)
Storage_plugin_unit_test	77.61% <ø> (ø)
unit_tests	68.17% <51.10%> (-0.05%)	⬇️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[5d]

Closing this ticket as we have opted to address this issue using a different approach.