fix(http): honor configured request header deadlines

Signed-off-by: Feng Ruohang <rh@vonng.com>
(cherry picked from commit 0d48d32d7e038ae1ea5966f3d7e0cb86780a6311)
Signed-off-by: Feng Ruohang <rh@vonng.com>

docs/investigations/r8/review/opus-v1.metadata.json

@@ -0,0 +1,24 @@
+{
+  "baseline_sha": "9ebe81c1b3611f9cc73e676b5b741c2be62c467a",
+  "plan": "plan-v1.md",
+  "plan_sha256": "7cb609e37e3199ecd93c992f08d123968ba8082682a108f20490e0644d735366",
+  "requested_model": "claude-opus-5",
+  "effort": "max",
+  "cli_version": "2.1.270",
+  "status": "completed",
+  "created_at_utc": "2026-09-15T15:44:56.500168+00:00",
+  "actual_assistant_models": [
+    "claude-opus-5"
+  ],
+  "result_subtype": "success",
+  "is_error": false,
+  "session_id": "7e51fd30-3842-47e9-9d19-47604d87b45b",
+  "duration_ms": 292649,
+  "raw_path": "/Users/vonng/tmp/silo-r8-01a0a5b9/opus-v1.jsonl",
+  "stderr_path": "/Users/vonng/tmp/silo-r8-01a0a5b9/opus-v1.stderr.log",
+  "raw_sha256": "7922230a171b041a3b736fa9b162282ce1d38614b57d0cf0c42f2f5eade566b7",
+  "review_sha256": "a6e7c616fe3a158f73e90af7414569f699eedc93e259289dcd0b5c94d75f2dbf",
+  "completed_at_utc": "2026-09-15T15:50:14.799630+00:00",
+  "verdict": "CONSENSUS",
+  "blocking_disagreements": 0
+}