WEBDEV-6081 Extend models for profile pages

[latonv]

This MR equips the search service with several new models to handle profile page requests & responses from the PPS. In particular, clients can now request specific page_elements, corresponding roughly to tabs on the profile page. The responses can now accordingly include their main content on a page_elements branch whose shape is determined in part by the type of page element being returned.

This necessarily includes some additional refactoring to cleanly handle what are now multiple page-element-specific means by which search hits must be processed to provide the caller with as consistent an output as possible.

[github-actions]

PR Preview Action v1.4.6
Preview removed because the pull request was closed.
2024-01-25 03:15 UTC

[codecov]

Codecov Report

Attention: 21 lines in your changes are missing coverage. Please review.

Comparison is base (7cad26c) 91.40% compared to head (fea99f6) 92.27%.

Files	Patch %	Lines
src/models/hit-types/web-archive-hit.ts	79.03%	13 Missing ⚠️
src/responses/search-response-details.ts	97.04%	5 Missing ⚠️
src/models/hit-types/item-hit.ts	91.30%	2 Missing ⚠️
src/responses/page-elements.ts	99.34%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #48      +/-   ##
==========================================
+ Coverage   91.40%   92.27%   +0.87%     
==========================================
  Files          27       29       +2     
  Lines        2688     3095     +407     
  Branches      235      271      +36     
==========================================
+ Hits         2457     2856     +399     
- Misses        220      230      +10     
+ Partials       11        9       -2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[iisa]

looks good, had some questions, comments.

q: do we need a page_elements test?