fix: image proxy url (#14505)

#### PR Dependency Tree


* **PR #14505** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Improvements**
* Better image-proxy detection to avoid double-proxying already proxied
images.
* Improved runtime image proxy configuration so images load consistently
across deployments.
* More robust image URL handling for optimized image loading and fewer
redundant requests.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/server.ts

@@ -60,10 +60,14 @@ export async function run() {
         corsOriginCallback(
           origin,
           finalAllowedOrigins,
-          blockedOrigin =>
-            logger.warn(`Blocked CORS request from origin: ${blockedOrigin}`, {
-              requestPath,
-            }),
+          blockedOrigin => {
+            if (!appendedOrigins.length) {
+              logger.warn(
+                `Blocked CORS request from origin: ${blockedOrigin}`,
+                { requestPath }
+              );
+            }
+          },
           originCallback
         );
       },