Add log for soft limit reach, tweak values, clippy

src/search/transposition_table.rs

@@ -15,8 +15,7 @@ impl TranspositionTable {
     }
 
     pub fn lookup(&self, zobrist_hash: ZobristHash) -> Option<&TTEntry> {
-        self
-            .positions
+        self.positions
             .get((zobrist_hash.0 % self.size) as usize)
             .and_then(|entry| entry.as_ref())
     }