fix(telemetry): downgrade TS telemetry-failure logs to debug

Telemetry is best-effort by contract — every PostHog hiccup or
network blip would print red error lines on user stderr otherwise.
Python uses logger.debug for the same paths; this restores parity.

Keeps console.error only at sites that surface a real user-facing
failure (e.g., MemoryClient init ping failed).

mem0-ts/src/client/telemetry.ts

@@ -64,12 +64,12 @@ class UnifiedTelemetry implements TelemetryClient {
       });
 
       if (!response.ok) {
-        console.error("Telemetry event capture failed:", await response.text());
+        console.debug("Telemetry event capture failed:", response.status);
         return false;
       }
       return true;
     } catch (error) {
-      console.error("Telemetry event capture failed:", error);
+      console.debug("Telemetry event capture failed:", error);
       return false;
     }
   }