observability(router): add tracing instrumentation to cascade router#1843
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observability(router): add tracing instrumentation to cascade router#1843
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…1825) - Log provider selection at the start of each cascade attempt (provider name, attempt N of M, classifier mode, quality threshold) - Log judge scoring success with score, threshold, and pass/fail decision - Log best_seen updates in both cascade_chat and cascade_chat_stream - Log final exhaustion path in cascade_chat when all providers are tried - Log last-provider selection in cascade_chat_stream (streaming, no classification) - Align cascade_chat_stream quality verdict log fields with cascade_chat (add threshold and reason) - Align cascade_chat_stream escalation log fields with cascade_chat (add threshold and escalations_remaining)
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Closes #1825
Summary
best_seenupdates in bothcascade_chatandcascade_chat_streamcascade_chatwhen all providers are triedcascade_chat_stream(streaming, no classification)cascade_chat_streamquality verdict log fields withcascade_chat(addthresholdandreason)cascade_chat_streamescalation log fields withcascade_chat(addthresholdandescalations_remaining)Changes
Single file modified:
crates/zeph-llm/src/router/mod.rs— 56 lines added (tracing calls only, no logic changes).Test plan
cargo +nightly fmt --check— cleancargo clippy --workspace --features full -- -D warnings— 0 warningscargo nextest run --workspace --features full --lib --bins— 5821 passed, 0 failed