add auth config base dependency

[wangkaibo34]

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[CLAassistant]

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[Copilot]

Pull Request Overview

Adds a pluggable credential provider and security-token support for SLS HTTP requests.

• Introduces CredentialsProvider interface and StaticCredentialsProvider, wired into SLSClientManager
• Extends GetAccessKey signature and propagates secToken through all prepare/post methods, adding the X_ACS_SECURITY_TOKEN header
• Updates constants, client manager init logic, and unit tests to cover the new flows

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
core/plugin/flusher/sls/CredentialsProvider.h	New credential interface and static implementation
core/plugin/flusher/sls/SLSConstant.{h,cpp}	Declare and define X_ACS_SECURITY_TOKEN constant
core/plugin/flusher/sls/SLSClientManager.{h,cpp}	Wire in the provider, update GetAccessKey, initialize default provider
core/plugin/flusher/sls/FlusherSLS.{h,cpp}	Propagate secToken through CreatePost*Request methods
core/plugin/flusher/sls/DiskBufferWriter.cpp	Add secToken argument to GetAccessKey call and Post* methods
core/unittest/flusher/SLSClientManagerUnittest.cpp	Update test to call the new GetAccessKey signature
core/unittest/flusher/FlusherSLSUnittest.cpp	Switch to StaticCredentialsProvider and updated SetCredentialsProvider

Comments suppressed due to low confidence (1)

core/unittest/flusher/FlusherSLSUnittest.cpp:858

• Consider adding an assertion after building the request to verify that X_ACS_SECURITY_TOKEN is correctly set in the request headers when secToken is non-empty.

    EnterpriseSLSClientManager::GetInstance()->SetCredentialsProvider("1234567890", std::move(provider));

[messixukejia]

enum class AuthType { ANONYMOUS, AK, STS };

非空就赋值并不是太合理，跟authtype的取值要有一致性。

191-196要总体考虑下这三种取值的关系。

[messixukejia]

xx