Fix license issues in cargo-deny config and refactor YARA compiler usage

deny.toml

@@ -9,6 +9,8 @@ allow = [
     "Unlicense",
     "Zlib",
     "Unicode-3.0",
+    "BSD-3-Clause",
+    "ISC",
 ]
 confidence-threshold = 0.8
 

ghost-core/src/yara_engine.rs

@@ -179,14 +179,13 @@ impl DynamicYaraEngine {
             });
         }
 
-        self.compiled_rules =
-            Some(
-                compiler
-                    .compile_rules()
-                    .map_err(|e| GhostError::Configuration {
-                        message: format!("Rule compilation failed: {}", e),
-                    })?,
-            );
+        self.compiled_rules = Some(
+            compiler
+                .compile_rules()
+                .map_err(|e| GhostError::Configuration {
+                    message: format!("Rule compilation failed: {}", e),
+                })?,
+        );
 
         log::info!("Successfully compiled {} YARA rules", rule_count);
         Ok(rule_count)