Fix broken default npm test command in queries/cdmq

[k-rister]

Problem

Running npm test from queries/cdmq fails because the package script invokes cdmq, but no cdmq executable is defined or installed:

> cdmq@1.0.0 test
> cdmq

sh: line 1: cdmq: command not found

Proposed solution

Replace the default test script with the repository's automated test suite, for example the native statistics unit and integration tests. Keep the live REST test separate because it requires a running CDM/OpenSearch environment.

Acceptance criteria

• npm test executes the supported automated tests.
• npm test passes in a clean dependency installation without requiring a globally installed cdmq command.
• Environment-dependent live REST tests remain separately invokable.

— AI-signed: Codex | model: GPT-5 | effort: not specified