fix(ci): satisfy strict lint delta on security follow-ups

src/providers/mod.rs

@@ -198,7 +198,11 @@ pub fn create_provider_with_url(
     api_url: Option<&str>,
 ) -> anyhow::Result<Box<dyn Provider>> {
     let resolved_credential = resolve_provider_credential(name, api_key);
-    let key = resolved_credential.as_deref();
+    let key = if let Some(value) = resolved_credential.as_ref() {
+        Some(value.as_str())
+    } else {
+        None
+    };
     match name {
         // ── Primary providers (custom implementations) ───────
         "openrouter" => Ok(Box::new(openrouter::OpenRouterProvider::new(key))),