fix(ci): pin E2E coverage bot to claude-sonnet-4-6 (retired model 404)

[bnsoni]

Problem

The E2E Coverage Bot (claude-code-action@beta) had no model: input, so it used the action’\s default — the retired snapshot claude-sonnet-4-20250514. The API now 404s it:

API Error: 404 not_found_error: "model: claude-sonnet-4-20250514"
→ exit code 1

So every coverage-bot run fails. Both os and lms had the same gap.

Fix

Pin a current model explicitly:

uses: anthropics/claude-code-action@beta
with:
  model: claude-sonnet-4-6   # current Sonnet; exact string, no date suffix
  anthropic_api_key: ...

claude-sonnet-4-6 is the drop-in for the retired Sonnet 4 and is cost-appropriate for a per-PR review bot. Pinning also prevents the default from floating to another retired model later.

🤖 Generated with Claude Code

[mamigot]

Claude finished @bnsoni's task —— View job

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E2E Coverage Bot

• Dismiss stale REQUEST_CHANGES reviews (none found)
• Identify changed files
• Run mechanical coverage check (skipped — no app routes changed)
• Apply decision logic

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✅ E2E Coverage — No Issues

Changed files:

• .github/workflows/e2e-coverage-bot.yml only (+3 lines: adds model: claude-sonnet-4-6)

No new app/**/page.tsx routes were introduced. No e2e specs were added or modified. All existing coverage is intact.

This PR is a CI-only fix that pins the coverage bot to a non-retired model. No user-facing behavior changed, so no e2e coverage updates are required.

Decision: CASE E — Approve ✅

Note: The gh pr review --approve command required additional tool permissions that were not available in this run. A human reviewer should approve this PR.