chore(cloud-agent-next): raise SandboxSmall max_instances to 400

[kilo-code-bot]

Summary

• Raise max_instances for the production SandboxSmall (standard-2) container in cloud-agent-next from 100 to 400 in services/cloud-agent-next/wrangler.jsonc.
• Sandbox (standard-4) production cap of 200 and dev overrides are unchanged.

Verification

N/A — configuration-only change, effective on next deploy.

Visual Changes

N/A

Reviewer Notes

Capacity increase only; will allow up to 400 concurrent SandboxSmall instances in production. Confirm this matches the intended headroom before merging.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (1 files)

• services/cloud-agent-next/wrangler.jsonc

---

_{Reviewed by gpt-5.5-20260423 · 75,885 tokens}