fix: CI issues - grcov installation and clippy warnings

Author: abdoufermat5

.github/workflows/ci.yml

@@ -87,10 +87,7 @@ jobs:
         toolchain: stable
 
     - name: Install grcov
-      run: |
-        curl -L --output grcov.tar.gz https://github.com/mozilla/grcov/releases/latest/download/grcov-linux-x86_64.tar.gz
-        tar -xf grcov.tar.gz
-        chmod +x grcov
+      run: cargo install grcov
 
     - name: Generate coverage
       run: |

src/database/mod.rs

@@ -311,10 +311,7 @@ impl Database {
                     }
                 }
             );
-            match result {
-                Ok(conn) => Some(conn),
-                Err(_) => None,
-            }
+            result.ok()
         };
 
         let mut recent_connections = self.list_connections(None, true)?;

src/models/session.rs

@@ -72,6 +72,7 @@ impl Session {
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
+#[allow(dead_code)]
 pub struct SessionStats {
     pub total_sessions: usize,
     pub active_sessions: usize,