fix: add envFrom to raw netmon manifest and reduce eBPF log noise (#374)

- Add envFrom block to zxporter-netmon.yaml so the raw manifest injects
  credentials from devzero-zxporter-env-config and devzero-zxporter-token,
  matching the helm chart behaviour (both optional to avoid pod failures
  when the secret/configmap is absent)
- Downgrade non-DNS packet parse errors in the eBPF tracer from Error to
  debug level (V(1)); these are expected for non-DNS traffic in netfilter
  mode and were producing excessive log spam

Author: Tzvonimir

config/zxporter-netmon.yaml

@@ -39,6 +39,13 @@ spec:
             - name: http
               containerPort: 8081
               protocol: TCP
+          envFrom:
+            - configMapRef:
+                name: devzero-zxporter-env-config
+                optional: true
+            - secretRef:
+                name: devzero-zxporter-token
+                optional: true
           env:
             - name: NODE_NAME
               valueFrom:

internal/networkmonitor/ebpf/tracer_linux.go

@@ -184,7 +184,7 @@ func (t *Tracer) Run(ctx context.Context) error {
 		// Parse the full raw packet captured from eBPF
 		event, err := parseEvent(record.RawSample)
 		if err != nil {
-			t.log.Error(err, "parsing event")
+			t.log.V(1).Info("skipping non-DNS event", "err", err)
 			continue
 		}