lang(edu): translate k8s manifest comments to English only

- restore-seed-job.yaml.example: translate runbook to English
- secrets.yaml.example: translate section headers to English
- webinar-checker.yaml: translate initContainer dependency-order comments to English

Co-authored-by: assistant

edu_master/k8s/restore-seed-job.yaml.example

@@ -1,17 +1,17 @@
-# Разовый Job для переноса состояния redis из docker compose в k8s (maintenance window).
-# Файл .example -> deploy-пайплайн его не применяет (маска *.example.yaml).
+# One-time Job to migrate redis state from docker compose to k8s (maintenance window).
+# The .example file is not applied by the deploy pipeline (mask *.example.yaml).
 #
 # Runbook:
-#   1. docker compose -f <repo>/edu_master/compose.yaml stop        # SIGTERM -> redis сбросит dump.rdb
+#   1. docker compose -f <repo>/edu_master/compose.yaml stop        # SIGTERM -> redis will flush dump.rdb
 #   2. docker run --rm -v edu_master_redis-data:/data \
 #        -v /tmp/edu-master-backup:/backup \
 #        redis:alpine sh -c "cp /data/dump.rdb /backup/ && ls -la /backup"
 #   3. kubectl apply -f edu_master/k8s/namespace.yaml
-#   4. kubectl apply -f <только PVC из redis.yaml>                  # seed строго ДО старта redis-пода
+#   4. kubectl apply -f <only the PVC from redis.yaml>              # seed must come BEFORE redis pod starts
 #   5. kubectl apply -f edu_master/k8s/restore-seed-job.yaml.example
 #      kubectl wait --for=condition=complete job/redis-restore-seed -n edu-master --timeout=120s
 #   6. kubectl delete job redis-restore-seed -n edu-master
-#   7. kubectl apply -f edu_master/k8s/ -R                           # остальные манифесты
+#   7. kubectl apply -f edu_master/k8s/ -R                           # apply remaining manifests
 apiVersion: batch/v1
 kind: Job
 metadata:
@@ -47,4 +47,4 @@ spec:
         - name: backup
           hostPath:
             path: /tmp/edu-master-backup
-            type: DirectoryOrCreate
+            type: DirectoryOrCreate