fix(server): remove unused request inspector helper

[INONONO66]

Summary

• remove unused RequestInspector.isClaudeModel namespace export reported by knip
• keep request inspection behavior unchanged; active inspect/detect/generate helpers remain intact

Verification

• bunx knip --reporter compact 2>&1 | rg "src/server/request-inspector.ts: isClaudeModel" || true
• bun test tests/unit/lifecycle.test.ts tests/unit/perf-metrics.test.ts tests/unit/response-body-cap.test.ts tests/unit/upstream-body-timeout.test.ts tests/unit/shutdown-stream-coordination.test.ts
• ./node_modules/.bin/tsc --noEmit --pretty false
• git diff --check
• bun run release-check
• LSP diagnostics for src/server/request-inspector.ts

---

Summary by cubic

Removed unused RequestInspector.isClaudeModel export from src/server/request-inspector.ts to clean up dead code. No changes to request inspection behavior; existing detect/inspect helpers remain unchanged.

^{Written for commit 7cee637. Summary will update on new commits.}

[coderabbitai]

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: c2443e4f-f026-45d4-ab82-7cff113ef005

📥 Commits

Reviewing files that changed from the base of the PR and between 6171bee and 7cee637.

📒 Files selected for processing (1)

• src/server/request-inspector.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/remove-unused-request-inspector-helper

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[cubic-dev-ai]

No issues found across 1 file

_{Re-trigger cubic}