refactor: minor cleanup

[justmoon]

Some assorted minor cleanup things. (Did a tour of the codebase for someone and noticed these issues.)

[codecov-io]

Codecov Report

Merging #463 into master will increase coverage by 0.01%.
The diff coverage is 15.38%.

@@            Coverage Diff            @@
##           master    #463      +/-   ##
=========================================
+ Coverage   71.68%   71.7%   +0.01%     
=========================================
  Files          44      44              
  Lines        2038    2032       -6     
  Branches      327     327              
=========================================
- Hits         1461    1457       -4     
+ Misses        577     575       -2

Impacted Files	Coverage Δ
src/services/core.ts	72% <ø> (-3.87%)	⬇️
src/app.ts	55.26% <0%> (+1.41%)	⬆️
src/services/route-builder.ts	90.38% <66.66%> (ø)	⬆️

---

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[codecov-commenter]

Codecov Report

Merging #463 into master will increase coverage by 0.01%.
The diff coverage is 15.38%.

@@            Coverage Diff             @@
##           master     #463      +/-   ##
==========================================
+ Coverage   71.68%   71.70%   +0.01%     
==========================================
  Files          44       44              
  Lines        2038     2032       -6     
  Branches      327      327              
==========================================
- Hits         1461     1457       -4     
+ Misses        577      575       -2     

Impacted Files	Coverage Δ
src/app.ts	55.26% <0.00%> (+1.41%)	⬆️
src/services/core.ts	72.00% <ø> (-3.87%)	⬇️
src/services/route-builder.ts	90.38% <66.66%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e00e24d...d210fba. Read the comment docs.