refactor: migrar GitLab → Gitea (aulas 10, 11, 13)

- Aula 10: Gitea + Registry + Actions + Runner (substituiu GitLab)
  - gitea-values.yaml: PostgreSQL standalone, Valkey standalone, ~800Mi RAM
  - setup.sh/cleanup.sh: namespace gitea, Helm gitea-charts/gitea + actions
  - README.md: documentação completa com de→para (GitLab/Harbor/Tekton vs Gitea)

- Aula 11: ArgoCD (GitOps) — removido GitLab Runner (runner vive na aula-10)
  - setup.sh: só ArgoCD, integração SSH com Gitea
  - node-bugado/.gitea/workflows/ci.yml: pipeline convertida

- Aula 13: Container Factory — atualizado para Gitea
  - setup.sh/cleanup.sh: referências GitLab → Gitea
  - pipelines/postgresql/ci.yml: Gitea Actions workflow
  - README.md: conexão com act_runner explicada

- CLAUDE.md: tabela de aulas atualizada

aula-13/images/large-test/.gitlab-ci.yml

@@ -0,0 +1,38 @@
+stages:
+  - build
+
+variables:
+  REGISTRY: registry.kube.quest
+  IMAGE_NAME: factory/large-test
+
+build:
+  stage: build
+  image: docker:27-dind
+  services:
+    - docker:27-dind
+  variables:
+    DOCKER_TLS_CERTDIR: ""
+    DOCKER_HOST: tcp://docker:2375
+  before_script:
+    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+    - docker buildx create --use --name builder --driver docker-container
+  script:
+    # Build eStargz (lazy pulling)
+    - echo "Building eStargz version..."
+    - |
+      docker buildx build \
+        --output type=image,name=${REGISTRY}/${IMAGE_NAME}:latest,push=true,compression=estargz,force-compression=true,oci-mediatypes=true \
+        .
+
+    # Build GZIP tradicional
+    - echo "Building GZIP version..."
+    - |
+      docker buildx build \
+        --output type=image,name=${REGISTRY}/${IMAGE_NAME}:gzip,push=true,compression=gzip,oci-mediatypes=true \
+        .
+
+    - echo "Images pushed:"
+    - echo "  - ${REGISTRY}/${IMAGE_NAME}:latest (eStargz ~1.5GB)"
+    - echo "  - ${REGISTRY}/${IMAGE_NAME}:gzip (GZIP ~1.5GB)"
+  tags:
+    - kubernetes