fix: message handle (#14178)

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

* **Bug Fixes**
* Robustly sanitize session titles, messages, attachments, and embedded
data to remove invalid/null characters and prevent corrupt persistence.
* Improve chat title generation to skip or recover from invalid input
and log contextual errors without crashing.
* Add more detailed storage and workspace logs and reduce repetitive
checks to aid troubleshooting and stability.

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settings.</sub>
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/base/storage/providers/s3.ts

@@ -434,7 +434,11 @@ export class S3StorageProvider implements StorageProvider {
 
       this.logger.verbose(`Deleted object \`${key}\``);
     } catch (e) {
-      this.logger.error(`Failed to delete object \`${key}\``);
+      this.logger.error(`Failed to delete object \`${key}\``, {
+        bucket: this.bucket,
+        key,
+        cause: e,
+      });
       throw e;
     }
   }