<feat>[iam2]: add ZIAM provider name constant (P1)

[ZStack-Robot]

Summary

P1 ZIAM OIDC ROPC 打通的父仓库部分：在 OAuth2PluginConstants 中新增 ZIAM_PROVIDER_NAME = "ziam"，作为 OAuth2ClientVO.identityProvider 的判别值，与 premium 仓库侧的 ZiamProvider / IAM2RopcLoginBackend 配套。

Test plan

• mvn clean package 编译通过
• 配合 premium 仓库 MR 合并后在 172.24.246.184 环境跑 ROPC 登录冒烟

sync from gitlab !9725

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 83a33a1 and 0515305.

📒 Files selected for processing (1)

• abstraction/src/main/java/org/zstack/abstraction/sso/OAuth2PluginConstants.java

✅ Files skipped from review due to trivial changes (1)

• abstraction/src/main/java/org/zstack/abstraction/sso/OAuth2PluginConstants.java

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Walkthrough

在 OAuth2PluginConstants 接口中新增两个字符串常量：ZIAM_PROVIDER_NAME = "ziam" 和 LOGIN_TYPE_IAM2_ROPC = "iam2_ropc"；未更改其它逻辑或控制流。

Changes

Cohort / File(s)	Summary
OAuth2 提供程序常量 abstraction/src/main/java/org/zstack/abstraction/sso/OAuth2PluginConstants.java	新增常量 ZIAM_PROVIDER_NAME = "ziam" 和 LOGIN_TYPE_IAM2_ROPC = "iam2_ropc"，扩展可识别的 OAuth2/OIDC 提供者及登录类型标识。

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

诗

🐰 我在代码田间跳，带来两串小名号，
一个叫 "ziam" 闪亮笑，一个是 "iam2_ropc" 招手。
行数不多心意长，轻声改动暖如春，
草间一跃庆新章，代码花开又一窟。

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	标题遵循 [scope]: 格式（feat[iam2]: add ZIAM provider name constant），长度50字符在72字符限制内，准确总结了主要变更内容。
Description check	✅ Passed	描述内容与变更集相关，清楚说明了新增常量的目的（作为OAuth2ClientVO.identityProvider的判别值）及其与premium仓库组件的配套关系。
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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/hanyu.liang/feature-5.5.22-zcf-temporary

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[coderabbitai]

🧹 Nitpick comments (1)

abstraction/src/main/java/org/zstack/abstraction/sso/OAuth2PluginConstants.java (1)

49-49: 常量定义正确，遵循了规范！

新增的 ZIAM_PROVIDER_NAME 常量：

• ✅ 命名遵循全大写+下划线的常量命名规范
• ✅ 没有使用冗余的 public static final 修饰符（接口常量隐式为 public static final）
• ✅ 与其他提供者常量（第 44-48 行）的模式保持一致
• ✅ 值 "ziam" 与现有提供者名称无冲突

根据 PR 目标，该常量将作为 OAuth2ClientVO.identityProvider 的鉴别值，用于支持 ZIAM OIDC ROPC 集成，符合设计意图。

♻️ 可选的风格统一建议

注意到文件中存在风格不一致：第 9-42 行的常量使用了显式的 public static final 修饰符，而第 44-49 行没有。根据编码规范"接口方法不应有多余的修饰符"（此规范同样适用于接口字段），建议在后续维护时统一移除第 9-42 行的冗余修饰符，使整个文件风格一致。

但这不影响当前 PR，当前新增代码已遵循了更好的实践。

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In
`@abstraction/src/main/java/org/zstack/abstraction/sso/OAuth2PluginConstants.java`
at line 49, Remove the redundant explicit modifiers from interface constants to
unify style: in OAuth2PluginConstants, change the earlier constants that
currently declare "public static final" to use the implicit interface-constant
form (no modifiers), so they match the newly added ZIAM_PROVIDER_NAME and other
provider constants; locate the constants declared in OAuth2PluginConstants (the
provider name constants and any others with explicit public static final) and
remove the explicit modifiers while keeping names and values unchanged.

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Nitpick comments:
In
`@abstraction/src/main/java/org/zstack/abstraction/sso/OAuth2PluginConstants.java`:
- Line 49: Remove the redundant explicit modifiers from interface constants to
unify style: in OAuth2PluginConstants, change the earlier constants that
currently declare "public static final" to use the implicit interface-constant
form (no modifiers), so they match the newly added ZIAM_PROVIDER_NAME and other
provider constants; locate the constants declared in OAuth2PluginConstants (the
provider name constants and any others with explicit public static final) and
remove the explicit modifiers while keeping names and values unchanged.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: http://open.zstack.ai:20001/code-reviews/zstack-cloud.yaml (via .coderabbit.yaml)

Review profile: CHILL

Plan: Pro

Run ID: 7884306f-3759-461a-afa7-7109404dfeef

📥 Commits

Reviewing files that changed from the base of the PR and between 21ebc82 and c179a4f.

📒 Files selected for processing (1)

• abstraction/src/main/java/org/zstack/abstraction/sso/OAuth2PluginConstants.java