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

CLAUDE.md

@@ -33,14 +33,15 @@ App de demonstração: `node-bugado` - trava após N requests para demonstrar he
 # Aulas 01-06 (Local)
 cd aula-XX && ./setup.sh      # ou kubectl apply -f .
 
-# Aulas 07-13 (Hetzner)
+# Aulas 07-15 (Hetzner)
 cd aula-08 && ./setup.sh      # Cluster base
 cd aula-09 && ./setup.sh      # n8n
-cd aula-10 && ./setup.sh      # Gitea
+cd aula-10 && ./setup.sh      # Gitea + Registry + Runner
 cd aula-11 && ./setup.sh      # ArgoCD
-cd aula-12 && ./setup.sh      # Victoria Metrics
+cd aula-12 && ./setup.sh      # Victoria Metrics + Grafana
 cd aula-13 && ./setup.sh      # Container Factory
 cd aula-14 && ./setup.sh      # Istio Traffic Splitting
+cd aula-15 && ./setup.sh      # APM: Tempo + OpenTelemetry
 ```
 
 ## App node-bugado