document mutation command atom guidance

[patroza]

Summary

• document when mutation state should use Command versus atoms
• pin CI and snapshot jobs to Node 24, matching the dev shell and release workflow; Node 26 prevents the cluster SQLite workflow tests from starting

Validation

• agent ship gate: pnpm check, pnpm lint, pnpm test

[patroza]

@omegent test

[omegent-app]

Test received. The PR comment integration is working.

[pkg-pr-new]

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@effect-app/cli

npm i https://pkg.pr.new/effect-app/libs/@effect-app/cli@819

effect-app

npm i https://pkg.pr.new/effect-app/libs/effect-app@819

@effect-app/eslint-codegen-model

npm i https://pkg.pr.new/effect-app/libs/@effect-app/eslint-codegen-model@819

@effect-app/eslint-shared-config

npm i https://pkg.pr.new/effect-app/libs/@effect-app/eslint-shared-config@819

@effect-app/infra

npm i https://pkg.pr.new/effect-app/libs/@effect-app/infra@819

@effect-app/vue

npm i https://pkg.pr.new/effect-app/libs/@effect-app/vue@819

@effect-app/vue-components

npm i https://pkg.pr.new/effect-app/libs/@effect-app/vue-components@819

commit: 650077c