Display metadata for each search result (if available)

Enhance search results by presenting relevant metadata such as content source, speaker identity, speaker age, gender, and recording date. Support graceful fallback when metadata is missing.

Start by locating the search-result rendering entry point and the code that provides result metadata. Check which source, speaker, age, gender, and recording-date fields are available; the work is done when available values are shown and missing values fall back gracefully.

Written by the indexing model from the issue text.