Add VictoriaMetrics for historical metrics (Mar 13+)

- Single-node VM deployment with 200Gi NVMe, 2y retention
- Traefik IngressRoute at vm.vultrlabs.dev (TLS + basic auth)
- Backfill script: pulls vLLM/DCGM metrics from Mimir, writes to VM
- Retain StorageClass so historical data survives PVC deletion
- README with deployment + Grafana mixed-datasource instructions

victoriametrics/04-basic-auth-middleware.yaml

@@ -0,0 +1,33 @@
+##############################################################################
+# Basic Auth Middleware for VictoriaMetrics Traefik IngressRoute
+# CHANGE THE PASSWORD BEFORE PRODUCTION USE!
+#
+# To generate a new htpasswd entry:
+#   htpasswd -nb <username> <password>
+# Then base64 encode it:
+#   echo -n '<htpasswd-output>' | base64
+# Update the secret below with the new value.
+##############################################################################
+
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: basic-auth-secret
+  namespace: victoriametrics
+type: Opaque
+# Generate with: htpasswd -nb vultr_vm <password> | base64
+# See .env for credentials
+stringData:
+  users: |-
+    vultr_vm:$apr1$ZtK5B1K4$SCWPgREqKwfcrCr4FA6En1
+
+---
+apiVersion: traefik.io/v1alpha1
+kind: Middleware
+metadata:
+  name: basic-auth
+  namespace: victoriametrics
+spec:
+  basicAuth:
+    secret: basic-auth-secret