SF-3745 Do not store or retrieve chapters not requested for drafts

[pmachapman]

This PR adds support for partial book drafting by:

• Only retrieving chapters that are requested in the draft (when chapters are specified)
• Updating the frontend UI and backend logic to handle scripture ranges that contain chapters (Serval already supports this)

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This change is 

[codecov]

Codecov Report

❌ Patch coverage is 70.79646% with 33 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.28%. Comparing base (a48acd9) to head (c7d7c0d).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...SIL.XForge.Scripture/Services/MachineApiService.cs	63.33%	26 Missing and 7 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3744      +/-   ##
==========================================
- Coverage   81.33%   81.28%   -0.06%     
==========================================
  Files         620      620              
  Lines       39051    39124      +73     
  Branches     6347     6369      +22     
==========================================
+ Hits        31764    31802      +38     
- Misses       6318     6346      +28     
- Partials      969      976       +7     

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[devin-ai-integration]

Devin Review found 0 new potential issues.

View 8 additional findings in Devin Review.