fix(i): Fetcher wrapper panic

[nasdf]

Relevant issue(s)

Resolves #3399

Description

This PR fixes an issue where the Start function of wrappingFetcher would not return an error causing a seg fault when trying to access the fetcher in a subsequent FetchNext call.

Tasks

• I made sure the code is well commented, particularly hard-to-understand areas.
• I made sure the repository-held documentation is changed accordingly.
• I made sure the pull request title adheres to the conventional commit style (the subset used in the project can be found in tools/configs/chglog/config.yml).
• I made sure to discuss its limitations such as threats to validity, vulnerability to mistake and misuse, robustness to invalidation of assumptions, resource requirements, ...

How has this been tested?

No added tests. I'm unsure if this is worth testing with mocks, but open to suggestions.

Specify the platform(s) on which this was tested:

• MacOS

[AndrewSisley]

Ooof, my bad, thanks Keenan 😅

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 78.26%. Comparing base (f24fda4) to head (544ede0).
Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
internal/db/fetcher/wrapper.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3400      +/-   ##
===========================================
+ Coverage    78.11%   78.26%   +0.15%     
===========================================
  Files          392      392              
  Lines        36045    36045              
===========================================
+ Hits         28155    28208      +53     
+ Misses        6208     6171      -37     
+ Partials      1682     1666      -16     

Flag	Coverage Δ
all-tests	78.26% <0.00%> (+0.15%)	⬆️

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

Files with missing lines	Coverage Δ
internal/db/fetcher/wrapper.go	82.11% <0.00%> (ø)

... and 16 files with indirect coverage changes

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