Wiki UX: Search and discoverability

[oldenbourglaura]

• CirrusSearch (Elasticsearch-backed, already used by Wikipedia) for full-text search with relevance ranking
• SemanticMediaWiki (SMW) for structured queries like "all papers by Author X on Topic Y published after 2018."
• Abstracts deserve special treatment — they should be stored as a dedicated template property so they surface in search results and category pages, not buried inside the page body