test(web): register snapshot network fixture

knip.json

@@ -59,6 +59,7 @@
         "acp-agent/tests/fixtures/subagent-result-diagnostic.ts",
         "acp-agent/tests/fixtures/subagent-report-fence.ts",
         "acp-agent/tests/fixtures/subagent-settlement-marker.ts",
+        "acp-agent/tests/fixtures/web-fetch-network.ts",
         "acp-agent/tests/fixtures/workspace-context-compaction.ts",
         "acp-agent/tests/fixtures/control-surface/control-surface-llm.ts",
         "acp-agent/tests/fixtures/subagent/subagent-acp/mock-delegating-llm.ts",