v0.22.4 — litectx 0.35.0 (keyword flag)

Consumes litectx 0.35.0's new per-hit keyword flag. Targeted /forget <topic> now decides "this fact matched a query word" via keyword instead of the retired score > 0 proxy (0.35.0 redefined score to the per-query-scaled fused rank value, so a meaning-only KNN nominee also scores > 0).

Behaviour is unchanged where it worked: an exact-word hit is kept even at low cosine (validated at a real cosine of 0.23), and an unrelated KNN nearest-neighbour is still dropped (the "unicorn bug"). Validated failably against the installed 0.35.0 artifact + mutation-proven both ways. 639/639.

Also includes the publish-workflow lockfile-drift check (#44), released here.

See CHANGELOG.md for detail.