Add Durable Object hibernation timeout to `@cloudflare/config`

[petebacondarwin]

Problem

Durable Objects can configure a hibernation timeout in Worker tooling, but the typed Cloudflare project configuration does not expose the equivalent option.

Expected behavior

Add a type-safe hibernation-timeout setting to the appropriate Durable Object configuration shape and preserve it through validation and conversion.

The authored shape does not need to copy another configuration format, but the resulting behavior must be equivalent.

Acceptance criteria

• The option is available through the curated public configuration types.
• Validation rejects invalid units, ranges, or placement with actionable messages.
• Conversion produces the expected deployment configuration.
• Omitting the option preserves the current default behavior.
• Schema, conversion, and public-type tests cover the new field.
• Documentation explains the accepted value and runtime effect.

[workers-devprod]

Automated triage

Issue assessment

• Actionability: ✅ Actionable.
• Type: Feature.
• Reproduction: Skipped automatically.
• Labels:
  • product:durable-objects (high)
  • feature:types (medium)

Actionability and missing information

Feature request to add a type-safe Durable Object hibernation timeout to the cloudflare config package, specified with problem, expected behavior, and acceptance criteria; a maintainer can implement and test from this evidence.

Reproduction reason: The report requests new configuration behavior rather than describing a defect in current behavior, so there is no issue behavior to reproduce.

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