Release 946.0.0

[GuillaumeRx]

Explanation

This is the release candidate for version 946.0.0.

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Low Risk
This is a version/dependency roll-forward with no functional code changes in this PR; risk is limited to compatibility issues introduced by the updated @metamask/keyring-controller dependency.

Overview
Bumps the monorepo release version to 946.0.0 and publishes @metamask/keyring-controller@25.3.0.

Updates dependent packages to require @metamask/keyring-controller@^25.3.0 (and records this in their changelogs), and refreshes yarn.lock accordingly.

^{Reviewed by Cursor Bugbot for commit fb29455. Bugbot is set up for automated code reviews on this repo. Configure here.}

[GuillaumeRx]

@metamaskbot update-changelogs

[metamaskbotv2]

✅ Changelogs updated and pushed.