Debug OS Worker

Read ../cloudflare-traces/SKILL.md first. Use the general Cloudflare API MCP server and its Workers Observability endpoints.

Scope

• Production service: os-prd; derive account IDs and preview service names from envs.ts rather than guessing.
• Current trace/custom-span dataset: otel.
• Current wide-log/invocation dataset: cloudflare-workers.
• Wide-log schema: iterate.wide-log.v1.

Fast path