Sarah Chavis

🔍 [Deploy preview](https://vault-lf64qllwz-hashicorp.vercel.app/vault/docs/upgrading/upgrade-to-1.15.x#kv2-url-change) 🎫 [Jira](https://hashicorp.atlassian.net/browse/SPE-560)

[BACKPORT] Manual cherry-pick of failed release/1.15.x backport PRs

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Covers the following updates Original PR | Failed backport | PR title ----------- | --------------- | ----------- #25119 | #26773 | Fix "auto unseal" case inconsistency #25835 | #26755 |...

[BACKPORT] Manual cherry-pick of failed release/1.14.x backport PRs

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Covers the following updates Original PR | Failed backport | PR title ----------- | --------------- | ----------- #25119 | #26772 | Fix "auto unseal" case inconsistency #25835 | #26754 |...

Covers the following updates Original PR | Failed backport | PR title ----------- | --------------- | ----------- #25119 | #26771 | Fix "auto unseal" case inconsistency #24152 | #26759 |...

[DOCS] Manage resources with TF

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Brings in the instructions from https://developer.hashicorp.com/well-architected-framework/operational-excellence/operational-excellence-migrate-unmanaged-vault-namespace-to-terraform-managed-infra#next-steps

[DOCS] Manual backport 28077

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Manual backport of content changes in #28077 Failed auto-backport: #28091

[DOCS] Add missing metric: vault.barrier.estimated_encryptions

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[SPE-962](https://hashicorp.atlassian.net/browse/SPE-962): Add information around missing metric `vault.barrier.estimated_encryptions` and update key rotation info to mention it [All metrics reference preview](https://vault-git-docs-spe-962-hashicorp.vercel.app/vault/docs/internals/telemetry/metrics/all#vault-barrier-estimated_encryptions) [Core system metrics reference](https://vault-git-docs-spe-962-hashicorp.vercel.app/vault/docs/internals/telemetry/metrics/core-system#barrier-metrics) [Storage metrics reference](https://vault-git-docs-spe-962-hashicorp.vercel.app/vault/docs/internals/telemetry/metrics/storage#barrier-metrics) [Key rotation preview](https://vault-git-docs-spe-962-hashicorp.vercel.app/vault/docs/internals/rotation) [SPE-962]:...

VAULT-29153: Update docs with IPv6 compliance info

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Add information about IPv6 compliance per the conversation in [VAULT-29153](https://hashicorp.atlassian.net/browse/VAULT-29153) Interoperability page preview: https://vault-git-docs-ipv6-updates-hashicorp.vercel.app/vault/docs/interoperability-matrix TCP listener page preview: https://vault-git-docs-ipv6-updates-hashicorp.vercel.app/vault/docs/configuration/listener/tcp [VAULT-29153]: https://hashicorp.atlassian.net/browse/VAULT-29153?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ