chore(security): reduce supply chain attack risk

[GeekyEggo]

• Tightens security on third-party dependencies
• Removes caching from release workflows

[changeset-bot]

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Latest commit: c83e346

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[Copilot]

Pull request overview

This PR reduces supply-chain risk in the monorepo by tightening pnpm’s dependency selection policy and removing dependency caching from the release workflow.

Changes:

• Enabled stricter pnpm workspace security policies (blockExoticSubdeps, trustPolicy).
• Increased minimumReleaseAge from 1 day to 1 week (with scoped exclusions for internal packages).
• Disabled actions/setup-node pnpm caching in the release workflow to mitigate cache poisoning risk.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
pnpm-workspace.yaml	Adds stricter pnpm workspace policies and increases minimum dependency release age.
.github/workflows/release.yml	Removes pnpm caching from the release pipeline to reduce cache poisoning exposure.

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