- All partial_cmp().unwrap() → unwrap_or(Ordering::Equal) to prevent
NaN panics in sort operations across neuro.rs, graph.rs, similarity.rs
- replay_queue_with_graph: accepts pre-built graph, avoids rebuilding
in agent_prompt (was building 2-3x per prompt)
- differentiate_hub_with_graph: same pattern for differentiation
- Simplify double-reverse history iteration to slice indexing
Co-Authored-By: ProofOfConcept <poc@bcachefs.org>