[codex] Allow CLI queries of concept aliases

[yibeichan]

Summary

• add concept_aliases to the CLI raw-query table allowlist
• document that the allowlist should stay aligned with schema.sql queryable tables
• add a regression test that selects alias rows through raw_query

Root cause

The MCP layer can write concept_aliases, but the CLI raw query validator only allowed docs, concepts, edges, docs_fts, and paper_metadata. Legitimate diagnostic queries against concept_aliases were rejected before reaching SQLite.

Validation

• cd cli && uv run --with pytest --with . python -m pytest tests/test_sqlite_query.py
• cd cli && uv run --with pytest --with . python -m pytest tests/

Closes #201