feat(db): migrate Slack connection IDs from env name to env id#5564

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pfreixes/nan-3540-slack-alert-migration

Commits on Mar 4, 2026

feat(db): migrate Slack connection IDs from env name to env id

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claude
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Commits on Mar 6, 2026

chore(db): remove Slack migration preview SQL and runbook

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claude
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refactor(db): simplify Slack migration to use UPDATE rowCount directly

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claude
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fix(db): update Slack migration test after removing rollback SQL helper

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claude
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