[yyyyaaa]

• Return HTTP 413 for oversized JSON and HTTP 400 for malformed JSON so callers can distinguish a rejected request from a server failure.
• Include the parser's 102,400-byte limit in the GraphQL error and keep the existing REST error format.
• Log parser failures at warning level without echoing request fragments.

[tenki-reviewer]

Review complete. No issues found — approved ✅.

---

This PR updates the error-handler middleware in the graphql/server package, adjusting how errors are mapped to HTTP statuses and which response envelope (GraphQL, REST JSON, or error page) is used, along with the associated logging behavior. No high-confidence defects were identified in the final review.

Files	Change
graphql/server/src/middleware/error-handler.ts	Reworks error-handling middleware: status-code mapping, response-envelope selection, and error logging.
graphql/server/src/middleware/__tests__/error-handler.test.ts	Expands unit tests covering the updated error-handler behavior.

_{Reviewed commit: e0264d1}