Add support for DEEBOT N9+ (device class: a7lhb1)

[stsy713]

Checks

• I have read the above text and I'm aware of the situation
• I have searched the existing issues and no issue is describing my issue
• I have installed the latest version

The feature you want to suggest

Device Information

Please add support for the following device:

• Device Name: DEEBOT N9+
• Model: N9_PLUS
• Device Class: a7lhb1
• Product ID (PID): 5f911e2fb789620008056fd2
• Material No: 130-6224-1301
• Company: eco-ng
• Product Category: DEEBOT
• Region: China (CN)

Error Log

Device "DEEBOT N9+" not supported. More information at #612
Device class "a7lhb1" not recognized. Please add support for it

Home Assistant Integration

• Integration: Ecovacs (official Home Assistant integration)
• HA Version: [2026.4.3]
• deebot-client Version:

Additional Context

• Device connects to Ecovacs cloud successfully (bindTs: 1745085394438)
• OTA updates supported
• UI Logic ID: DK_850_CN

Willing to Help

• I can provide additional logs
• I can test development builds
• I can help reverse engineer the device protocol

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Related: This issue is related to #612 (device support tracking)