[AlertingV2] Per-tick dispatcher telemetry, event watermark, and ES|QL IN-clause chunking#271990

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kdelemme wants to merge 7 commits into

elastic:mainfrom

kdelemme:alerting-v2/dispatcher-per-tick-telemetry-clean

Commits on May 29, 2026

[AlertingV2] extract dispatcher telemetry into its own submodule

kdelemme
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claude
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[AlertingV2] add per-tick dispatcher telemetry + step_error halts

kdelemme
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claude
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[AlertingV2] bound fetch_episodes with an event watermark + run fetch_policies concurrently

kdelemme
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claude
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[AlertingV2] chunk oversized ES|QL IN-lists to stay under 16.8 MB buffer limit

kdelemme
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chore(alerting_v2): simplify and clean up dispatcher

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fix(alerting_v2): re-bind ApplyMaintenanceWindowStep and guard throttling policy lookup

kdelemme
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claude
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test(alerting_v2): remove non-functional Jest dispatcher integration test

kdelemme
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