Fix warnings: add Debug derive, prefix unused vars

src/basic/keywords/mcp_directory.rs

@@ -276,6 +276,7 @@ pub struct McpLoadError {
 }
 
 /// MCP CSV Loader
+#[derive(Debug)]
 pub struct McpCsvLoader {
     /// Base work path
     work_path: String,
@@ -421,11 +422,11 @@ impl McpCsvLoader {
             .get(7)
             .map(|s| s.trim().to_string())
             .filter(|s| !s.is_empty());
-        let risk_level = columns
+        let _risk_level = columns
             .get(8)
             .map(|s| s.trim().to_string())
             .filter(|s| !s.is_empty());
-        let requires_approval = columns
+        let _requires_approval = columns
             .get(9)
             .map(|s| s.trim().to_lowercase() == "true")
             .unwrap_or(false);

src/core/bootstrap/mod.rs

@@ -6,7 +6,7 @@ use anyhow::Result;
 use aws_config::BehaviorVersion;
 use aws_sdk_s3::Client;
 use diesel::{Connection, RunQueryDsl};
-use log::{debug, error, info, trace, warn};
+use log::{debug, error, info, warn};
 use rand::distr::Alphanumeric;
 use rcgen::{
     BasicConstraints, CertificateParams, DistinguishedName, DnType, IsCa, Issuer, KeyPair,