Method poll_build_completions

nodedb/src/data/executor/vector_checkpoint.rs:33–48

Drain completed HNSW builds from the background builder thread and promote the corresponding building segments to sealed segments. Called at the top of `tick()` before draining new requests. `BuildComplete.key` is the old-style `"{tid}:{coll}"` string (produced by `VectorCollection::seal` which still takes `&str`). Parse it back to the tuple key to look up the map.

(&mut self)

    /// by `VectorCollection::seal` which still takes `&str`). Parse it back to
    /// the tuple key to look up the map.
    pub fn poll_build_completions(&mut self) {
        let Some(rx) = &self.build_rx else { return };
        while let Ok(complete) = rx.try_recv() {
            // Parse the string key `"{tid}:{coll_key}"` back into the tuple.
            let tuple_key = parse_build_key(&complete.key);
            if let Some(coll) = self.vector_collections.get_mut(&tuple_key) {
                coll.complete_build(complete.segment_id, complete.index);
                tracing::info!(
                    core = self.core_id,
                    key = %complete.key,
                    segment_id = complete.segment_id,
                    "HNSW build completed, segment promoted to sealed"
                );
            }
        }
    }

    /// Write HNSW checkpoints for all vector indexes to disk.
    ///