research-wiki-system export candidate

This is a local dry-run export of the reusable research-wiki system code.

It intentionally excludes the private vault corpus:

• wiki/
• Zotero/BetterBibTeX exports
• local PDF/library attachments
• personal Obsidian state
• generated indexes such as .graph_index/
• local runtime/deploy caches such as .omx/, .run/, and .wrangler/

Use tests/fixtures/sample-vault/ as the public-safe sample vault while testing system behavior outside the private observatory repository.

Embedding regression fixtures

The embedding tests create synthetic JSONL facts and minimal SQLite compatibility metadata directly, without importing the excluded legacy GraphRAG package. Production embedding and query behavior are unchanged.

uv run pytest tests/test_wiki_fact_embeddings.py -q