Fine-grained TTL and tag invalidation for 'use cache' — defining custom profiles in next.config.
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`cacheLife` and `cacheTag` — how do you configure TTL profiles?
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cacheLifecacheTag
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cacheLife picks a named TTL profile (minutes/hours/days or custom) and cacheTag attaches tags; define custom profiles in next.config.js cacheLife / experimental.cacheLife.
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