Restart the Gateway when its historical data farm stops serving

On 2026-10-12 the Gateway answered account requests but every bar request
timed out from 09:50 to 10:24 ET: make gateway reported OK, so the Gateway was
never restarted, and six retries 5 minutes apart gave up after 35 minutes. The
data came back only with the Gateway's daily restart.

ibkr-quant gateway --history also requires SPY daily bars within 30 s; the
trade job's ExecStartPre passes it, so ensure-gateway.sh restarts a Gateway
whose data farm is down. The trade job now retries every 10 minutes until
about 15:30 ET (34 starts in 6 h) instead of giving up after 35 minutes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

deploy/systemd/ibkr-quant-trade.service

@@ -1,17 +1,20 @@
 [Unit]
 Description=ibkr-quant daily run: today's bars, then MOC orders on rebalance sessions
 After=ibgateway.service
-# make gateway restarts a Gateway that has lost IBKR. Retries cover today's bar
-# arriving late (delayed data) and Gateway restarts; make submit refuses to
-# double-submit while orders are open.
-StartLimitIntervalSec=7200
-StartLimitBurst=6
+# make gateway restarts a Gateway that has lost IBKR or its historical data
+# farm. Retries cover today's bar arriving late (delayed data) and Gateway
+# restarts; make submit refuses to double-submit while orders are open.
+# Every 10 minutes from 09:50 until about 15:30 ET (34 starts), inside the
+# 09:31-15:45 order window: on 2026-10-12 six retries 5 minutes apart gave up
+# after 35 minutes while the data farm was down.
+StartLimitIntervalSec=21600
+StartLimitBurst=34
 
 [Service]
 Type=oneshot
 WorkingDirectory=%h/projects/ibkr-quant
 Environment=PATH=%h/.local/bin:/usr/local/bin:/usr/bin:/bin
-ExecStartPre=/usr/bin/make gateway
+ExecStartPre=/usr/bin/make gateway GATEWAY_ARGS=--history
 ExecStart=/usr/bin/make bars submit
 Restart=on-failure
-RestartSec=300
+RestartSec=600