fix(docs): restore pre-activation billing guidance

[roshanjonah]

Summary

• Restores current pre-activation limits and usage rates.
• Removes the unreleased Free and Pro changelog entry.
• Syncs the generated management OpenAPI and Postman snapshots.

Scope

• Billing v2 remains dormant.
• Activation is out of scope.

Verification

• npm test (3 tests)
• npm run confidentiality:check
• npm run external-links:check
• npm run postman:check
• mint validate
• mint broken-links

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Qualify increase requests by team eligibility

For a Free team whose resource has reached 80% but is not eligible for an increase, this promises that Request increase will appear and that the API can submit the request. This conflicts with the existing release guidance, which says increases are available only “where the option is available” (changelog.mdx:81), and with the committed API schema’s 403 response for an ineligible team (openapi-app.json:15864). Preserve the eligibility qualifier and direct ineligible teams to support instead.

AGENTS.md reference: AGENTS.md:L3-L5

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