docs: refresh example release notices and links

[qw-in]

Remove missed notices and swap to new console domain.

[arcjet-review]

Arcjet Review — 🟢 Low Risk

Decision: Approved

Rationale: This PR is a documentation-only sweep across the examples/ directory. It performs two mechanical changes: (1) swaps every app.arcjet.com reference to console.arcjet.com in READMEs, env examples, code comments, and deploy URLs, and (2) removes four > [!IMPORTANT] notices in eve-agent, mastra-agent, nextjs-guard-policy, and node-guard-policy that warned about pinned unpublished packages. No executable logic, no dependency versions, no auth, and no secrets are touched. Risk is Low and there are no security flags, so approval is appropriate.

Summary of Changes

Replaces app.arcjet.com with console.arcjet.com across all example apps (READMEs, .env.example files, code comments, and Vercel deploy URLs), and removes four stale 'depends on unpublished package' notices in the eve-agent, mastra-agent, nextjs-guard-policy, and node-guard-policy examples.

Notes

Large file count (~90 files) but the diff is repetitive and mechanical (URL substitution plus four notice removals), well below anything requiring size escalation.

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