[FEATURE] Include facets from all associated metadata sections for fulltext pages

[michaelkubina]

Problem: Previously, full-text pages only indexed facets from the top-level element (e.g., Type: Monograph, Volume), which meant that additional metadata in other metadata sections were not utilized, even though pages were explicitly associated with these through the StructLink/structMap-Logical. Basically all extensive efforts made in Kitodo.Production to structure the document internally (apart from the bibliographic record) were not even used on the page-level.

Solution: This PR extends the indexing to include facets from all DMD sections associated with the page through the StructLink and StructMap-Logical as well as the corresponding (structure) type. As a result, full-text hits can now be filtered down to more granular structural elements they have been associated with (Table, Illustration, Article, Index, Entry, etc.). Additionally, any deeper metadata beneath the top-level element (bibliographic record) is now included in the indexing process as well, expanding the possibilities to filter fulltext-results further - e.g. filtering for Authors of journal-articles instead of only the editor/publisher of a journal.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 0.00%. Comparing base (d64f433) to head (681e72e).
Report is 1 commits behind head on main.

Additional details and impacted files

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