Summary

• Adds use crate::provider::MessageMetadata; inside #[cfg(test)] mod tests in crates/zeph-llm/src/candle_provider/template.rs
• MessageMetadata was used in sample_messages() helper but never imported, causing --features candle alone to fail compilation

Root Cause

template.rs imports only Message and Role at the module level. The test module's use super::* does not pull in MessageMetadata since it was not in scope. --features full masks this because all features are enabled together.

Test Plan

• cargo nextest run -p zeph-llm --features candle --lib — 812/812 passed (was failing before fix)
• cargo nextest run --workspace --features full --lib --bins — 6554/6554 passed
• cargo +nightly fmt --check — clean
• cargo clippy --all-targets --features full --workspace -- -D warnings — no new warnings

Closes #2189