Description

PR #800 引入的 Helm chart 默认使用 OpenAI 模型、缺少 root_api_key 字段和关键 storage 配置段。本 PR 将默认模型切换为火山引擎 doubao 系列，补齐缺失配置，并添加安全防护。

Related Issue

Follow-up to #800

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Performance improvement
• Test update

Changes Made

• values.yaml: 添加 root_api_key: "" 到 server 配置；补齐 storage.vectordb 和 storage.agfs 配置段（local backend 默认值）；embedding/vlm 切换为火山引擎 doubao 系列模型
• deployment.yaml: 添加 replicaCount > 1 的 fail 校验，防止多副本共享 PVC 导致 RocksDB 写锁竞争
• NOTES.txt: 当 root_api_key 未设置时输出警告提示
• README.md: Quick Start/Custom Values 示例更新为火山引擎参数；Configuration 表格添加 root_api_key 条目

Testing

• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have tested this on the following platforms:
  • Linux
  • macOS
  • Windows

验证命令：

# 渲染模板 — 语法正确
helm template test deploy/helm/openviking

# root_api_key 出现在 ConfigMap 中
helm template test deploy/helm/openviking | grep root_api_key

# replicaCount > 1 正确报错
helm template test deploy/helm/openviking --set replicaCount=2

Checklist

• My code follows the project's coding style
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published

Screenshots (if applicable)

N/A

Additional Notes

🤖 Generated with Claude Code