Added new referrer history stats API

[rshbhgrg]

refs https://github.com/TryGhost/Team/issues/1939

[codecov[bot]]

Codecov Report

Base: 53.28% // Head: 53.33% // Increases project coverage by +0.05% :tada:

Coverage data is based on head (fefa257) compared to base (7cadaa6). Patch coverage: 98.11% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #15449      +/-   ##
==========================================
+ Coverage   53.28%   53.33%   +0.05%     
==========================================
  Files        1418     1418              
  Lines       89358    89462     +104     
  Branches     9641     9650       +9     
==========================================
+ Hits        47611    47714     +103     
- Misses      40792    40795       +3     
+ Partials      955      953       -2     

Impacted Files	Coverage Δ
ghost/stats-service/lib/stats.js	79.36% <60.00%> (-2.00%)	:arrow_down:
ghost/stats-service/lib/referrers.js	77.64% <100.00%> (+31.93%)	:arrow_up:
ghost/admin/app/components/gh-site-iframe.js	43.18% <0.00%> (-2.28%)	:arrow_down:
ghost/admin/app/components/gh-dropdown.js	89.79% <0.00%> (-2.05%)	:arrow_down:
ghost/admin/app/utils/publish-options.js	72.04% <0.00%> (-1.25%)	:arrow_down:
ghost/admin/app/controllers/offer.js	35.26% <0.00%> (-0.53%)	:arrow_down:
ghost/admin/app/components/gh-file-uploader.js	86.04% <0.00%> (+3.10%)	:arrow_up:
ghost/admin/app/helpers/gh-price-amount.js	66.66% <0.00%> (+22.22%)	:arrow_up:

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

:umbrella: View full report at Codecov.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.