T-0.1 Flux GitOps layout + dev/prod overlays + platform component skeletons (R-GITOPS-01/03, R-ENV-02, R-PLAT-01)

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

platform/monitoring/loki.yaml

@@ -0,0 +1,33 @@
+---
+# Loki — log aggregation (docs/10). Phase 0 STUB. PVC size is an overlay knob (R-ENV-02).
+apiVersion: helm.toolkit.fluxcd.io/v2
+kind: HelmRelease
+metadata:
+  name: loki
+  namespace: monitoring
+spec:
+  interval: 30m
+  chart:
+    spec:
+      chart: loki
+      version: ">=6.0.0 <7.0.0"   # TODO(WS-OBS): pin at bring-up; Renovate maintains
+      sourceRef:
+        kind: HelmRepository
+        name: grafana
+        namespace: monitoring
+  install:
+    remediation:
+      retries: 3
+  upgrade:
+    remediation:
+      retries: 3
+  values:
+    # TODO(WS-OBS, Phase 4): single-binary vs scalable deployment mode; retention via compactor
+    #   (retention_enabled: true — a period alone does nothing); storage backing.
+    loki:
+      storage:
+        type: filesystem
+    singleBinary:
+      persistence:
+        storageClass: longhorn
+        size: ${MONITORING_LOKI_PVC_SIZE}