Add test case for revocation with only 1 installation

[bennycode]

Add a Jest test in sdks/node-sdk/test/Client.test.ts to verify Client.revokeAllOtherInstallations() resolves without error when only 1 installation exists

Add a new test case in Client.test.ts that registers a client, asserts there is exactly one installation whose id matches client.installationId, and asserts that calling Client.revokeAllOtherInstallations() resolves without throwing.

📍Where to Start

Start with the new test case in Client.test.ts, focusing on the Client.revokeAllOtherInstallations() invocation and the single-installation assertions.

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Macroscope summarized 01476cf.

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Latest commit: 01476cf

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Project	Deployment	Preview	Comments	Updated (UTC)
xmtp-chat-api-service	Ready	Preview	Comment	Sep 15, 2025 11:17am
xmtp-js-xmtp-chat	Ready	Preview	Comment	Sep 15, 2025 11:17am

[bennycode]

Test case is related to xmtp/libxmtp#2547

[zyj94364461-sudo]

全是大神，可惜我不会编码

[zyj94364461-sudo]

各位都辛苦了