ia analytics, move to 1% sampled bucket

[iisa]

Calls transferred to 1% sample bucket:

• on load, signal when book is restricted
• volume sorting when viewing a multi-volume book

[codecov]

Codecov Report

Merging #1105 (68f7b0e) into master (1947d88) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1105      +/-   ##
==========================================
+ Coverage   70.50%   70.52%   +0.01%     
==========================================
  Files          59       59              
  Lines        5493     5493              
  Branches     1035     1035              
==========================================
+ Hits         3873     3874       +1     
+ Misses       1602     1601       -1     
  Partials       18       18              

Impacted Files	Coverage Δ
src/BookNavigator/book-navigator.js	78.35% <100.00%> (ø)
src/BookNavigator/volumes/volumes-provider.js	77.55% <100.00%> (+2.04%)	⬆️

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