style(snapshot): format FIR-1051 root fallback

Signed-off-by: Troy Fortin <troy@firelock.io>

Author: troyjr4103

crates/kin-db/src/storage/snapshot.rs

@@ -763,8 +763,11 @@ impl SnapshotManager {
         let matched_root = metadata.as_ref().and_then(|m| {
             if vector_metadata_matches_graph(m, graph_root_hash, expected_embedder_identity) {
                 Some(graph_root_hash)
-            } else if vector_metadata_matches_graph(m, canonical_root_hash, expected_embedder_identity)
-            {
+            } else if vector_metadata_matches_graph(
+                m,
+                canonical_root_hash,
+                expected_embedder_identity,
+            ) {
                 Some(canonical_root_hash)
             } else {
                 None