fix: Storage access should wait until SDK initializes

[cbaker6]

New Pull Request Checklist

• I am not disclosing a vulnerability.
• I am creating this PR in reference to an issue.

Issue Description

Approach

TODOs before merging

• Add tests
• Add entry to changelog

[codecov]

Codecov Report

Merging #65 (e85db38) into main (16c9ec6) will decrease coverage by 0.04%.
The diff coverage is 79.06%.

@@            Coverage Diff             @@
##             main      #65      +/-   ##
==========================================
- Coverage   90.48%   90.44%   -0.04%     
==========================================
  Files         166      166              
  Lines       14905    14942      +37     
==========================================
+ Hits        13487    13515      +28     
- Misses       1418     1427       +9     

Impacted Files	Coverage Δ
Sources/ParseSwift/LiveQuery/ParseLiveQuery.swift	70.84% <56.75%> (-0.33%)	⬇️
Sources/ParseSwift/Types/ParseConfiguration.swift	96.96% <83.33%> (-3.04%)	⬇️
Sources/ParseSwift/Parse.swift	97.98% <92.85%> (+0.07%)	⬆️
Sources/ParseSwift/API/API.swift	99.40% <100.00%> (ø)
Sources/ParseSwift/Objects/ParseInstallation.swift	88.31% <100.00%> (-0.02%)	⬇️
Sources/ParseSwift/Objects/ParseUser.swift	90.79% <100.00%> (+0.01%)	⬆️
Sources/ParseSwift/Storage/ParseStorage.swift	83.87% <100.00%> (+1.72%)	⬆️
Sources/ParseSwift/Types/ParseConfig.swift	100.00% <100.00%> (ø)

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