chore(nemo-agents): add relay ATIF->Intake telemetry to email-phishing-agent

WIP toward ASTD-385. Adds an atif http-storage sink pointing at the local
Intake ingest endpoint, alongside the existing atof file sink. Note: this does
not yet produce Intake spans for the in-process DeepAgents harness (only local
ATOF is emitted today); tracked in ASTD-385. Endpoint is hardcoded to the local
Intake (127.0.0.1:8080), matching the sibling agent-relay-intake.yaml.

Signed-off-by: Nathan Walston <nwalston@nvidia.com>

Author: walston

plugins/nemo-agents/examples/nemo-agent-config/email-phishing-agent/agent.yaml

@@ -90,6 +90,13 @@ telemetry:
   provider: relay
   output_dir: ./artifacts/relay
   project: email-phishing-agent
+  atif:
+    enabled: true
+    filename_template: trajectory-{session_id}.atif.json
+    storage:
+      - type: http
+        endpoint: http://127.0.0.1:8080/apis/intake/v2/workspaces/default/ingest/atif
+        timeout_millis: 3000
   atof:
     enabled: true
     filename: events.atof.jsonl