fix: auditoria de coerência entre aulas

Bugs corrigidos:
- aula-15: tracing.js fallback OTel endpoint usava service name errado
  (otel-collector vs otel-collector-opentelemetry-collector)
- aula-11/13: manifests k8s com gitea.kube.quest hardcoded → placeholder

Arquivos legado removidos (9):
- aula-10: gitlab-values.yaml, gitlab-registry-storage-secret.yaml,
  object-storage-secret.yaml, registry-storage-secret.yaml
- aula-11: gitlab-runner-values.yaml, node-bugado/.gitlab-ci.yml
- aula-13: 3x .gitlab-ci.yml (substituídos por .gitea/workflows/ci.yml)

CLAUDE.md: comandos rápidos agora incluem aula-14 e aula-15

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

@@ -1,38 +0,0 @@
-stages:
-  - build
-
-variables:
-  REGISTRY: gitea.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