feat: migrate to artifactapi 3+

What changed:
- Adds new v3 API and UI deployments (separate api-deployment.yaml, ui-deployment.yaml) alongside the existing monolithic artifactapi-deployment.yaml
- Adds CNPG PostgreSQL cluster + pooler to replace the standalone postgres deployment
- Adds new api-env configmap, new Vault secrets (postgres-credentials, environment), and a second VaultAuth (default1)
- Adds new services targeting the split api and ui selectors
- Adds HPAs for both new deployments
- Updates kustomization to include all new resources

apps/base/artifactapi/api-deployment.yaml

@@ -46,7 +46,7 @@ spec:
                 name: api-env
                 optional: false
             - secretRef:
-                name: environment2
+                name: environment
                 optional: false
           volumeMounts:
             - name: combined-certs

apps/base/artifactapi/vaultstaticsecret.yaml

@@ -54,7 +54,7 @@ spec:
 apiVersion: secrets.hashicorp.com/v1beta1
 kind: VaultStaticSecret
 metadata:
-  name: environment2
+  name: environment
   namespace: artifactapi
 spec:
   destination: