FEAT(otel): add OTel Collector for logs and traces

- Add OpenTelemetry Operator for CR management
- Deploy OTel Collector as DaemonSet via CR
- Enable filelog receiver for container log collection
- Replace Promtail with OTel filelog receiver
- Keep Prometheus for ServiceMonitor-based metrics scraping

opentelemetry-collector/argocd.yaml

@@ -5,18 +5,14 @@ metadata:
   namespace: argocd
   finalizers:
   - resources-finalizer.argocd.argoproj.io
+  annotations:
+    argocd.argoproj.io/sync-wave: "1"
 spec:
   project: default
-  sources:
-  - repoURL: https://open-telemetry.github.io/opentelemetry-helm-charts
-    chart: opentelemetry-collector
-    targetRevision: 0.108.0
-    helm:
-      valueFiles:
-      - $values/opentelemetry-collector/helm-values.yaml
-  - repoURL: https://github.com/K3S-HOME/observability.git
+  source:
+    repoURL: https://github.com/K3S-HOME/observability.git
     targetRevision: main
-    ref: values
+    path: opentelemetry-collector/manifests
   destination:
     server: https://kubernetes.default.svc
     namespace: opentelemetry
@@ -29,6 +25,7 @@ spec:
     - CreateNamespace=true
     - PrunePropagationPolicy=foreground
     - PruneLast=true
+    - ServerSideApply=true
     retry:
       limit: 5
       backoff: