revise August 2021 storage contract articles

2026-07-31 13:02:44 +03:00
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+  <title id="title">Безопасная эволюция контракта profile.settings</title>
+  <desc id="desc">Вертикальная последовательность: зафиксировать version one и samples, добавить reader version two с различением absent и null, затем добавить writer version two с optional timezone и проверить матрицу. Внизу показан запрет на narrowing старых значений и смену семантики.</desc>
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+  <text x="92" y="98" font-family="Arial, sans-serif" font-size="42" font-weight="700" fill="#ffffff">Эволюция договора: reader раньше writer</text>
+  <text x="92" y="132" font-family="Arial, sans-serif" font-size="25" fill="#bed3ed">Каждый шаг имеет sample и проверяемый verdict</text>
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+  <text x="144" y="252" font-family="Arial, sans-serif" font-size="31" font-weight="700" fill="#ffffff">1. Зафиксировать v1</text>
+  <text x="144" y="292" font-family="Arial, sans-serif" font-size="24" fill="#d7e9ff">core-поля, samples, owner, daily</text>
+  <text x="144" y="325" font-family="Arial, sans-serif" font-size="22" fill="#aac9e8">не менять meaning задним числом</text>
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+  <text x="700" y="458" font-family="Arial, sans-serif" font-size="31" font-weight="700" fill="#ffffff">2. Добавить reader v2</text>
+  <text x="700" y="498" font-family="Arial, sans-serif" font-size="24" fill="#dbfff2">v1 → timezone: absent</text>
+  <text x="700" y="531" font-family="Arial, sans-serif" font-size="22" fill="#aee8d4">null остаётся explicit clear</text>
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+  <text x="144" y="670" font-family="Arial, sans-serif" font-size="31" font-weight="700" fill="#ffffff">3. Добавить writer v2</text>
+  <text x="144" y="710" font-family="Arial, sans-serif" font-size="24" fill="#dbfff2">+ optional timezone</text>
+  <text x="144" y="743" font-family="Arial, sans-serif" font-size="22" fill="#aee8d4">старый core и meaning сохранены</text>
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+  <text x="700" y="882" font-family="Arial, sans-serif" font-size="31" font-weight="700" fill="#ffffff">4. Проверить matrix</text>
+  <text x="700" y="922" font-family="Arial, sans-serif" font-size="24" fill="#fff0bf">v1→v1, v1→v2, v2→v1, v2→v2</text>
+  <text x="700" y="955" font-family="Arial, sans-serif" font-size="22" fill="#f6d982">negative case: reject</text>
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+  <text x="108" y="1128" font-family="Arial, sans-serif" font-size="31" font-weight="700" fill="#fff5f7">Стоп до rollout</text>
+  <text x="350" y="1128" font-family="Arial, sans-serif" font-size="27" fill="#ffe0e6">narrowing · required вместо optional</text>
+  <text x="108" y="1176" font-family="Arial, sans-serif" font-size="24" fill="#ffbecb">Новый смысл старого key: сначала transition и owner decision.</text>
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