fix: report npm bridge transport errors

[SanjithSambath]

Summary

• report hosted and stdio transport/protocol errors to stderr instead of dropping them
• preserve stdout for JSON-RPC and leave shutdown, exit-code, timeout, and SDK retry behavior unchanged
• bump the npm bridge to 1.0.2 so the merged fix is published by the release workflow

Why

The bridge did not install client.onerror or server.onerror handlers. Errors delivered through those SDK callbacks therefore had no diagnostic output, leaving operators without the underlying hosted or stdio failure.

This PR deliberately does not claim to fix silent process exit. The real Streamable HTTP transport does not emit onclose for network failures. A POST SSE response that ends cleanly without a JSON-RPC response can also remain pending until the SDK request timeout; that SDK-level behavior is outside this observability patch.

Testing

• pnpm test
• bridge regression test verifies hosted and stdio errors are written to stderr

[mcp-use]

Deployment #103 deployed successfully

Status	Logs	URL	Updated
	Build Logs | Runtime Logs	🔗 MCP URL	Jul 29 2026 12:22 am

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