refactor(server): apply rustfmt and clippy suggestions

Formatting pass across simulation, perception, knowledge, NPC, and
test modules. Includes two clippy fixes in monologue.rs (.values()
instead of for (_, v) pattern).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/tests/shadowcast_bench.rs

@@ -4,9 +4,9 @@
 //! Run with: cargo test --test shadowcast_bench -- --ignored --nocapture
 
 use rand::Rng;
-use rand_chacha::ChaCha8Rng;
 use rand::SeedableRng;
-use settled_reach_server::perception::shadowcast::{symmetric_shadowcast, recursive_shadowcast};
+use rand_chacha::ChaCha8Rng;
+use settled_reach_server::perception::shadowcast::{recursive_shadowcast, symmetric_shadowcast};
 use std::collections::HashSet;
 use std::time::Instant;
 
@@ -173,12 +173,14 @@ fn benchmark_symmetric_vs_recursive() {
 
         let results = bench_config(&config);
 
-        println!("  Symmetric:  {:.2}ms total, {:.2}µs/call, {:.1} tiles avg",
+        println!(
+            "  Symmetric:  {:.2}ms total, {:.2}µs/call, {:.1} tiles avg",
             results.symmetric_ms,
             results.symmetric_ms * 1000.0 / config.iterations as f64,
             results.symmetric_avg_tiles
         );
-        println!("  Recursive:  {:.2}ms total, {:.2}µs/call, {:.1} tiles avg",
+        println!(
+            "  Recursive:  {:.2}ms total, {:.2}µs/call, {:.1} tiles avg",
             results.recursive_ms,
             results.recursive_ms * 1000.0 / config.iterations as f64,
             results.recursive_avg_tiles