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/cleanup.sh

@@ -0,0 +1,71 @@
+#!/bin/bash
+# =============================================================================
+# Aula 13 - Cleanup
+# =============================================================================
+
+set -e
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m'
+
+log_info() { echo -e "${BLUE}[INFO]${NC} $1"; }
+log_success() { echo -e "${GREEN}[OK]${NC} $1"; }
+log_warn() { echo -e "${YELLOW}[WARN]${NC} $1"; }
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+# Carregar configuração
+if [[ -f "${SCRIPT_DIR}/.env" ]]; then
+    source "${SCRIPT_DIR}/.env"
+fi
+
+DEPLOY_NAMESPACE="${DEPLOY_NAMESPACE:-factory}"
+
+echo ""
+echo "=========================================="
+echo "   Removendo Container Factory"
+echo "=========================================="
+echo ""
+
+# Remover recursos do PostgreSQL
+log_info "Removendo PostgreSQL..."
+kubectl delete -f "${SCRIPT_DIR}/k8s/postgresql/deployment.yaml" -n ${DEPLOY_NAMESPACE} 2>/dev/null || true
+kubectl delete -f "${SCRIPT_DIR}/k8s/postgresql/service.yaml" -n ${DEPLOY_NAMESPACE} 2>/dev/null || true
+kubectl delete -f "${SCRIPT_DIR}/k8s/postgresql/configmap.yaml" -n ${DEPLOY_NAMESPACE} 2>/dev/null || true
+kubectl delete secret postgresql-secret -n ${DEPLOY_NAMESPACE} 2>/dev/null || true
+
+# Perguntar sobre PVC (dados serão perdidos!)
+echo ""
+log_warn "O PVC contém os dados do PostgreSQL!"
+read -p "Remover PVC (DADOS SERÃO PERDIDOS)? [y/N]: " REMOVE_PVC
+if [[ "$REMOVE_PVC" =~ ^[Yy]$ ]]; then
+    kubectl delete -f "${SCRIPT_DIR}/k8s/postgresql/pvc.yaml" -n ${DEPLOY_NAMESPACE} 2>/dev/null || true
+    log_success "PVC removido"
+else
+    log_info "PVC mantido"
+fi
+
+# Remover namespace (opcional)
+echo ""
+read -p "Remover namespace ${DEPLOY_NAMESPACE}? [y/N]: " REMOVE_NS
+if [[ "$REMOVE_NS" =~ ^[Yy]$ ]]; then
+    kubectl delete namespace ${DEPLOY_NAMESPACE} --timeout=60s 2>/dev/null || true
+    log_success "Namespace removido"
+fi
+
+# Remover .env
+if [[ -f "${SCRIPT_DIR}/.env" ]]; then
+    rm "${SCRIPT_DIR}/.env"
+    log_info ".env removido"
+fi
+
+echo ""
+log_success "Cleanup concluído!"
+echo ""
+echo "Nota: As imagens no registry não foram removidas."
+echo "Para remover, acesse o Gitea Packages manualmente:"
+echo "  https://${GITEA_HOST:-gitea.kube.quest}/factory/postgresql/packages"
+echo ""