ref(core): Make event processing logs warnings

It can be confusing to users why event processing errors log out as errors. Let's bump this down to warnings instead - which better represent how actionable most of these thrown errors are.

Author: AbhiPrasad

packages/core/src/baseclient.ts

@@ -541,7 +541,7 @@ export abstract class BaseClient<O extends ClientOptions> implements Client<O> {
         return finalEvent.event_id;
       },
       reason => {
-        IS_DEBUG_BUILD && logger.error(reason);
+        IS_DEBUG_BUILD && logger.warn(reason);
         return undefined;
       },
     );