Add missing error handlers on stream pipelines

- AnonymizedFile.anonymizedContent(): propagate content errors to the
  anonymizer so callers see the failure instead of hanging.
- AnonymizedFile.send() local path: add error handler on the anonymizer
  transform between content and response pipes.
- S3.send(): handle errors on the S3 body stream to avoid unhandled
  emits crashing the process.
- S3.archive() / FileSystem.archive(): propagate read-stream errors
  to the file transformer so archiver sees the failure.
- Add frontend translations for new error codes.

src/core/storage/FileSystem.ts

@@ -228,10 +228,12 @@ export default class FileSystem extends StorageBase {
 
     await this.listFiles(repoId, dir, {
       onEntry: async (file) => {
-        let rs = await this.read(repoId, file.path);
+        let rs: Readable = await this.read(repoId, file.path);
         if (opt?.fileTransformer) {
-          // apply transformation on the stream
-          rs = rs.pipe(opt.fileTransformer(file.path));
+          const src = rs;
+          const transformer = opt.fileTransformer(file.path);
+          src.on("error", (err) => transformer.destroy(err));
+          rs = src.pipe(transformer);
         }
         const f = file.path.replace(fullPath, "");
         archive.append(rs, {