fix: raise LGSM keepalive threshold

[MarcStdt]

Summary

• change LGSM default keepAliveTraffic from 10kb/5m to 1mb/5m
• regenerate ARK, CS2, CSGO, GMod, 7D, and Unturned scrolls
• leave DayZ explicitly unchanged because it is skipped in this pass

Validation

• go run ./scripts/validate-scrolls.go
• ./scripts/validate_all_scrolls.sh
• git diff --check

Production observation

• Fresh 7D runtime without players still saw about 44KB RX in the recent 5m window, enough to keep 10kb/5m true. 1mb/5m should let that idle runtime reengage coldstarter.

[druid-infra]

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