feat(lasuite): add People service (desk chart); migrate La Suite secrets to VSO

People (desk chart v0.0.7):
- Add people-values.yaml with all env vars wired to ConfigMaps and Secrets.
  DB password, S3 credentials, OIDC client, and Django secret key all come
  from VSO-managed K8s Secrets via secretKeyRef — nothing hardcoded.
- Add Helm chart entry to kustomization.yaml (repo: suitenumerique/people).

La Suite VSO secrets (vault-secrets.yaml):
- seaweedfs-s3-credentials VSS (shared S3 creds → S3_ACCESS_KEY / S3_SECRET_KEY)
- hive-db-url VDS (database/static-creds/hive → postgresql:// DSN, 24h rotation)
- hive-oidc VSS (secret/hive → client-id / client-secret)
- people-db-credentials VDS (database/static-creds/people → password, 24h rotation)
- people-django-secret VSS (secret/people → DJANGO_SECRET_KEY)

base/lasuite/kustomization.yaml

@@ -12,4 +12,17 @@ resources:
   - seaweedfs-buckets.yaml
   - shared-config.yaml
   - oidc-clients.yaml
+  - vault-secrets.yaml
+
+# La Suite Numérique Helm charts.
+# Charts with a published Helm repo use helmCharts below.
+# find has no published repo yet — deploy manually when OpenSearch is ready.
+helmCharts:
+  # helm repo add people https://suitenumerique.github.io/people/
+  - name: desk
+    repo: https://suitenumerique.github.io/people/
+    version: "0.0.7"
+    releaseName: people
+    namespace: lasuite
+    valuesFile: people-values.yaml