<feature>[gpu]: add GPU XID error event alarm

[zstack-robot-2]

Summary

• 新增 GPU XID 错误事件报警，通过解析 dmesg 内核日志检测 NVIDIA XID 错误
• 新增 HOST_PHYSICAL_GPU_XID_ERROR CanonicalEvent 路径和数据类
• 新增 GPU_XID 枚举到 HostHardware，KVMHostFactory 路由到扩展点

Resolves: ZSTAC-85055

sync from gitlab !9913

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: caaa918d-d769-40a1-b716-8daba9e94699

📥 Commits

Reviewing files that changed from the base of the PR and between 48a1af3 and 4505935.

📒 Files selected for processing (6)

• header/src/main/java/org/zstack/header/host/HostCanonicalEvents.java
• header/src/main/java/org/zstack/header/host/HostHardware.java
• header/src/main/java/org/zstack/header/vm/VmCanonicalEvents.java
• plugin/kvm/src/main/java/org/zstack/kvm/KVMAgentCommands.java
• plugin/kvm/src/main/java/org/zstack/kvm/KVMConstant.java
• plugin/kvm/src/main/java/org/zstack/kvm/KVMHostFactory.java

🚧 Files skipped from review as they are similar to previous changes (3)

• header/src/main/java/org/zstack/header/host/HostHardware.java
• plugin/kvm/src/main/java/org/zstack/kvm/KVMHostFactory.java
• header/src/main/java/org/zstack/header/host/HostCanonicalEvents.java

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Walkthrough

在代码中新增 GPU XID 硬件类型与主机/虚拟机层事件常量和数据类，增加 KVM Agent DTO 与路径常量，并在 KVM 主机事件分发处添加 GPU_XID 分支以调用扩展点处理。

变更内容

GPU XID 硬件事件支持

Layer / File(s)	Summary
硬件类型与事件合约 header/src/main/java/org/zstack/header/host/HostHardware.java, header/src/main/java/org/zstack/header/host/HostCanonicalEvents.java, header/src/main/java/org/zstack/header/vm/VmCanonicalEvents.java	新增 HostHardware.GPU_XID；在 HostCanonicalEvents 新增 HOST_PHYSICAL_GPU_XID_ERROR 常量与 HostPhysicalGpuXidErrorData（hostUuid, pcideviceAddress, xidCode, message）；在 VmCanonicalEvents 新增 VM_GPU_XID_ERROR 常量与 VmGpuXidErrorData（vmUuid, pciDeviceAddress, xidCode, message）。
Agent DTO 与 KVM 常量 plugin/kvm/src/main/java/org/zstack/kvm/KVMAgentCommands.java, plugin/kvm/src/main/java/org/zstack/kvm/KVMConstant.java	新增 KVMAgentCommands.VmEventAlarmCmd（hostUuid, vmUuid, eventType, properties）和 KVMConstant.HOST_VM_EVENT_ALARM 路径常量。
事件处理分发集成 plugin/kvm/src/main/java/org/zstack/kvm/KVMHostFactory.java	在物理硬件状态告警事件的 switch 中新增 HostHardware.GPU_XID 分支，遍历 KvmHardwareStatusHandlerExtensionPoint 并以 HostHardware.GPU_XID 调用 handleKvmHardwareStatus。

估算代码审查工作量

🎯 2 (Simple) | ⏱️ ~8 分钟

诗

🐰 GPU 的错误码飞来，
新增了 XID 的追踪，
枚举与事件契约已定，
Agent 与分发亦已连通，
兔子为监控鼓掌欢呼！

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	拉取请求标题清晰准确地总结了主要变更：添加GPU XID错误事件告警功能，与代码变更完全相关。
Description check	✅ Passed	拉取请求描述与变更集高度相关，详细说明了新增GPU XID错误事件告警功能、新增CanonicalEvent路径、GPU_XID枚举和路由扩展点等具体内容。
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch sync/xinhao.huang/fix/ZSTAC-85055@@2

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