Upgrade sandbox containers to standard-3

[skrishnan22]

Summary

• upgrade the production sandbox container tier from standard-1 to standard-3
• keep the operator example config aligned
• retain the existing five-container maximum

Verification

• pnpm verify
• git diff --check orgin/main...HEAD

[greptile-apps]

Greptile Summary

This PR upgrades Sandbox containers from standard-1 to standard-3 while retaining the five-container limit.

• Updates the production Wrangler configuration.
• Keeps the operator example configuration aligned.
• Preserves the existing container image, class, and maximum instance count.

Confidence Score: 5/5

The PR appears safe to merge because the tier upgrade is valid and consistently applied across production and operator configurations.

No concrete failure or repository-rule violation remains; the deployment path inherits the updated production configuration, and no code or test depends on the previous tier.

Important Files Changed

Filename	Overview
packages/worker/wrangler.toml	Upgrades the production Sandbox instance tier to the supported standard-3 configuration.
packages/worker/wrangler.operator.example.toml	Aligns the operator configuration example with the production Sandbox tier.

_{Reviews (1): Last reviewed commit: "chore: upgrade sandbox containers to sta..." | Re-trigger Greptile}