Stop reporting user/environment errors as unexpected bugs

[lucyxiang]

Summary

Adds 2 new patterns to errorMessageImpliesEnvironmentIssue in cli-kit/error.ts to prevent common user environment errors from being reported as unhandled CLI bugs in Bugsnag/error-analytics.

These errors are caused by the user's environment, not CLI bugs. They were showing up as handled=false (unexpected) in error-analytics, creating noise.

Patterns added

Pattern	Events (7d)	Cause	Observe
write EPIPE	~1,540	User's process exits or terminal closes mid-output, breaking the pipe. Stacks are 100% node:internal/stream_base_commons.	293820890752078061, 10594213926861919143
Unsupported platform	~16	User runs CLI on an unsupported OS/arch combination (e.g. win32 arm64). Stacks originate from workerd/lib/main.js platform check.	12730362776183823558

Patterns considered but excluded

Pattern	Reason
Cannot find module	~1% of events are missing files inside @shopify/cli/dist/ which could indicate packaging bugs.
does not provide an export named	Matches minified Shopify admin bundle errors (e.g. FlowBasedAutomationsQuery...export 'f') — those are real bugs, not user issues.
is not exported by	Same concern — could match internal Shopify code bundle failures.
Build failed	Could mask real package bugs (e.g. our vite plugin or preset breaking builds).
Build function failed	Same — e.g. Hydrogen preset throws plain Error for unsupported config like buildEnd, which is our code.

Each included pattern was verified by inspecting individual stack traces to confirm zero CLI/Shopify code is involved.

Test plan

• Added test cases for both new patterns in error.test.ts
• All existing tests continue to pass
• Verify error volume reduction in Observe after deploy

🤖 Generated with Claude Code

[github-actions]

We detected some changes at packages/*/src and there are no updates in the .changeset.
If the changes are user-facing, run pnpm changeset add to track your changes and include them in the next release CHANGELOG.

Caution

DO NOT create changesets for features which you do not wish to be included in the public changelog of the next CLI release.