refactor: remover todas as dependências do GitLab no workshop

- Aula 08: nginx-ingress TCP passthrough gitlab→gitea, comments
- Aula 09: add-client.sh API GitLab→Gitea
- Aula 11: node-bugado deployment image registry.kube.quest→gitea.kube.quest
- Aula 12: setup.sh/cleanup.sh API GitLab→Gitea, ArgoCD repoURL
- Aula 13: k8s manifests, benchmarks: registry.kube.quest→gitea.kube.quest,
           gitlab-registry→gitea-registry, GITLAB_TOKEN→GITEA_TOKEN
- Aula 14: comments GitLab→Gitea
- README raiz: arquitetura, tabela, DNS

aula-10/gitlab-registry-storage-secret.yaml

@@ -0,0 +1,34 @@
+# =============================================================================
+# GitLab Registry Storage Secret - Hetzner Object Storage
+# =============================================================================
+#
+# Este secret configura o Registry para usar Hetzner Object Storage (S3 compatível)
+#
+# ANTES DE APLICAR:
+# 1. Crie o bucket "gitlab-registry" na Hetzner Cloud Console
+# 2. Gere credenciais S3 (Access Key + Secret Key)
+# 3. Substitua os valores <PLACEHOLDER> abaixo
+#
+# Para aplicar:
+#   kubectl apply -f gitlab-registry-storage-secret.yaml
+#
+# =============================================================================
+
+apiVersion: v1
+kind: Secret
+metadata:
+  name: gitlab-registry-storage
+  namespace: gitlab
+type: Opaque
+stringData:
+  config: |
+    s3:
+      bucket: gitlab-registry
+      accesskey: <HETZNER_ACCESS_KEY>
+      secretkey: <HETZNER_SECRET_KEY>
+      region: eu-central
+      regionendpoint: https://fsn1.your-objectstorage.com
+      v4auth: true
+      secure: true
+      chunksize: 5242880
+      rootdirectory: /