feat(inputs.huebridge): Add brightness and color fields to light metric

[rogiervandergeer]

Summary

The inputs.huebridge plugin currently only emits an on field for each light, which makes it impossible to track brightness or color state through Telegraf. This PR adds four new fields to the huebridge_light metric:

• brightness (float, 0–100) — current brightness percentage for dimmable lights
• color_temp (int) — color temperature in mireds when the light is in the CT spectrum
• color_x, color_y (float) — CIE xy color point for color-capable lights

All four fields are already present in the existing GetLights() response from the Hue v2 API, so no additional API calls, dependency changes, or plugin configuration are needed. Each field is emitted only when the light reports it (e.g. brightness is absent for non-dimmable lights, color_x/color_y are absent for white-only lights), matching the nil-guard pattern used by processDevicePowers().

Users who want to suppress specific fields can use the standard fieldexclude / fieldpass Telegraf options; no plugin-level toggles are added.

Changes

• plugins/inputs/huebridge/bridge.go — add four field emissions in processLights(), each guarded by its own nil check.
• plugins/inputs/huebridge/README.md — document the new fields under huebridge_light.
• plugins/inputs/huebridge/testdata/metrics/huebridge.txt — regenerated from the existing mock to include the new field values. No changes to the mock itself — go-hue's built-in mock.json already contains dimming, color, and color_temperature data on its light records.

Checklist

• No AI generated code was used in this PR
• AI generated code used in this PR follows the InfluxData Policy on AI-Generated Code Contributions

Related issues

resolves #18738

[telegraf-tiger]

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amd64.deb	aarch64.rpm	darwin_amd64.tar.gz	windows_amd64.zip
arm64.deb	armel.rpm	darwin_arm64.tar.gz	windows_arm64.zip
armel.deb	armv6hl.rpm	freebsd_amd64.tar.gz	windows_i386.zip
armhf.deb	i386.rpm	freebsd_armv7.tar.gz
i386.deb	ppc64le.rpm	freebsd_i386.tar.gz
mips.deb	riscv64.rpm	linux_amd64.tar.gz
mipsel.deb	s390x.rpm	linux_arm64.tar.gz
ppc64el.deb	x86_64.rpm	linux_armel.tar.gz
riscv64.deb		linux_armhf.tar.gz
s390x.deb		linux_i386.tar.gz
		linux_mips.tar.gz
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		linux_ppc64le.tar.gz
		linux_riscv64.tar.gz
		linux_s390x.tar.gz

[srebhan]

Thanks a lot @rogiervandergeer!

[skartikey]

@rogiervandergeer Thanks for the contribution!