fix: harden WASM phase 5 harness

spikes/wasm-phase5/run_phase5.sh

@@ -7,21 +7,52 @@ cd "$(dirname "$0")/../.."
 OUT=/tmp/uce/wasm-phase5
 mkdir -p "$OUT"
 
-python3 tests/run_network_tests.py --include-internal --json-report "$OUT/native-network.json"
-python3 tests/run_network_tests.py --include-internal --match starter --json-report "$OUT/native-starter.json"
-python3 spikes/wasm-phase5/audit_site_statics.py
-python3 spikes/wasm-phase5/benchmark.py --out-dir "$OUT"
+# The network suite can show transient cold-compile timeouts immediately after a
+# binary rebuild. Run a throwaway pass first so the measured gate is a warmed
+# parity signal rather than a compiler-cache signal. The warmup is allowed to
+# fail; the measured pass below is not.
+python3 tests/run_network_tests.py --include-internal --exclude 'site tests tasks' --json-report "$OUT/native-network-warmup.json" || true
 
-python3 - <<'PY'
+network_status=0
+starter_status=0
+benchmark_status=0
+python3 tests/run_network_tests.py --include-internal --json-report "$OUT/native-network.json" || network_status=$?
+python3 tests/run_network_tests.py --include-internal --match starter --json-report "$OUT/native-starter.json" || starter_status=$?
+python3 spikes/wasm-phase5/audit_site_statics.py --out-dir "$OUT"
+python3 spikes/wasm-phase5/benchmark.py --out-dir "$OUT" || benchmark_status=$?
+
+NETWORK_STATUS=$network_status STARTER_STATUS=$starter_status BENCHMARK_STATUS=$benchmark_status python3 - <<'PY'
 import json
+import os
 from pathlib import Path
+
+MIN_NETWORK_CASES = 80
+MIN_STARTER_CASES = 10
+MIN_BENCHMARKS = 3
 out = Path('/tmp/uce/wasm-phase5')
 network = json.loads((out / 'native-network.json').read_text())
 starter = json.loads((out / 'native-starter.json').read_text())
 bench = json.loads((out / 'benchmark.json').read_text())
 failures = [r for r in network if not r['ok']] + [r for r in starter if not r['ok']] + [r for r in bench if not r['ok']]
-if failures:
+structural_failures = []
+if len(network) < MIN_NETWORK_CASES:
+    structural_failures.append(f"network suite ran {len(network)} cases, expected at least {MIN_NETWORK_CASES}")
+if len(starter) < MIN_STARTER_CASES:
+    structural_failures.append(f"starter subset ran {len(starter)} cases, expected at least {MIN_STARTER_CASES}")
+if len(bench) < MIN_BENCHMARKS:
+    structural_failures.append(f"benchmark ran {len(bench)} rows, expected at least {MIN_BENCHMARKS}")
+nonzero = {
+    'network_status': int(os.environ['NETWORK_STATUS']),
+    'starter_status': int(os.environ['STARTER_STATUS']),
+    'benchmark_status': int(os.environ['BENCHMARK_STATUS']),
+}
+for name, status in nonzero.items():
+    if status != 0:
+        structural_failures.append(f"{name} exited {status}")
+if failures or structural_failures:
     print('PHASE5 HARNESS: FAIL')
+    for failure in structural_failures:
+        print(failure)
     for failure in failures:
         print(failure)
     raise SystemExit(1)