[Test] ReadResource response shaping by content.type (text/binary/json)

[cloud-nitrostack]

Tests for ReadResource response shaping by content.type (text / binary / json)

Summary: ReadResource builds MCP contents from a switch on content.type. Regressions (e.g. missing break) should be caught by tests.

Where to change: typescript/packages/core/src/core/server.ts (handler); new or extended tests under typescript/packages/core/src/**/__tests__/ (follow existing layout).

Acceptance criteria:

• Tests for text, binary, and json branches assert mimeType, text vs blob, and JSON stringification of data only for json.
• No fall-through to default for valid json payloads.

Suggested labels: test, good first issue

---

Source: docs/STARTER_ISSUES_REVIEW.md — edit in-repo first, then sync GitHub issues if needed.