feat: implement cron window spread backend - #4566

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feat/cron-windows

Commits on Aug 12, 2026

update db schema
carderne
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3ce772a
failing fastpath test
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9147888
add schedule timing logic
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6ee08e7
cron window persistence
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ec1ec2e
disable fastpath for delayed jobs
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07fd09e
persist schedule phase
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f92cb8d
thread effective schedule through schedule-engine
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923db55
add feature flag
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f003d9c
add timestamp to clickhouse
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951f899
more o11y
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d91193c
support zero, improve tests, add server-change
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3131ed5
add non-null check constraint
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c499599
Update schedule-windows.md
carderne
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f6fd57b
cap at 24h, no d option, cap too-large windows and log
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73b1a69
prevent multiple schedules after downtime
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e38b457
preserve existing jobs when schedule unchanged
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bca75ca
fix upcoming timestamps
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00c1ddd
simplify phase_source span
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bc4e47f
add spread_fraction rollout
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40059cb
fix: restore timing fields to declarative schedule sync select
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6d46620