Forwarder: resolve opencode workspace/session dynamically per request (#28)

src/mesh/mesh.service.ts

@@ -452,11 +452,12 @@ export class MeshService implements OnModuleInit, OnModuleDestroy {
     const maxAttempts = NOTIFY_RETRY_DELAYS_MS.length + 1;
     for (let attempt = 1; ; attempt++) {
       try {
-        await fetch(this.notifyUrl, {
+        const res = await fetch(this.notifyUrl, {
           method: 'POST',
           headers: { 'content-type': 'application/json' },
           body: JSON.stringify(body),
         });
+        if (res && !res.ok) throw new Error('HTTP ' + res.status); // HTTP errors retry like network failures
         return; // success on any attempt — same as today's single POST
       } catch (err: unknown) {
         const msg = (err as Error).message;