style(fmt): normalize after round-2 lint fixes

`cargo fmt --all` cleanup for the three files round-2 touched but
didn't run through rustfmt afterwards:
- crates/holograph/src/navigator.rs (W10 added a cfg-gated import)
- crates/lance-graph-contract/src/orchestration_mode.rs (round-2
  added `use std::cmp::Reverse` for the sort_by_key replacement)
- crates/lance-graph-planner/src/strategy/gremlin_parse.rs
  (collapsible_match → match-guard pattern, multi-line `if` guards)

Verified: `cargo fmt --all --check` exits 0.

Author: claude

crates/holograph/src/navigator.rs

@@ -52,9 +52,9 @@
 
 use std::sync::Arc;
 
-use crate::bitpack::{BitpackedVector, VECTOR_BITS, VectorRef};
 #[cfg(feature = "datafusion-storage")]
 use crate::bitpack::VectorSlice;
+use crate::bitpack::{BitpackedVector, VECTOR_BITS, VectorRef};
 use crate::epiphany::TWO_SIGMA;
 use crate::hamming::{
     Belichtung, StackedPopcount, hamming_distance_ref, hamming_distance_scalar,

crates/lance-graph-contract/src/orchestration_mode.rs

@@ -41,9 +41,9 @@
 // modulation override path (TD-ORCH-1). Currently only `ThinkingStyle`
 // is consumed; the modulation hook is wired in `OrchestrationBridge`
 // but not yet routed through this module.
-use std::cmp::Reverse;
 #[allow(unused_imports)]
 use crate::thinking::{FieldModulation, ThinkingStyle};
+use std::cmp::Reverse;
 
 // ═══════════════════════════════════════════════════════════════════════════
 // INFERENCE STAGES — the atoms of reasoning

crates/lance-graph-planner/src/strategy/gremlin_parse.rs

@@ -624,10 +624,9 @@ fn parse_gremlin_steps(source: &str) -> Result<Vec<GremlinStep>, PlanError> {
             // collapsible_match (Rust 1.95): match-guard form collapses
             // the inner `if let Some(GremlinStep::Order(asc))` into the
             // outer match arm.
-            "by"
-                if args.len() >= 2
-                    && args[1].to_lowercase().contains("desc")
-                    && matches!(steps.last(), Some(GremlinStep::Order(_))) =>
+            "by" if args.len() >= 2
+                && args[1].to_lowercase().contains("desc")
+                && matches!(steps.last(), Some(GremlinStep::Order(_))) =>
             {
                 if let Some(GremlinStep::Order(asc)) = steps.last_mut() {
                     *asc = false;