mcp-server impl

[freeznet]

No description provided.

[Copilot]

Pull Request Overview

This PR implements the basic infrastructure for the StreamNative MCP Server, adding authentication flows, token caching, client credentials processing, and CI/CD pipeline configurations.

• Introduces new authentication and token processing logic in pkg/auth
• Adds client credentials flow implementation and token caching
• Configures build, lint, and release workflows as well as an updated README

Reviewed Changes

Copilot reviewed 890 out of 894 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
pkg/auth/data_url.go	Implements data URL parsing with regex validation
pkg/auth/config_tokenprovider.go	Adds a config-backed caching provider for tokens
pkg/auth/client_credentials_provider.go	Implements key file provider for client credentials
pkg/auth/client_credentials_flow.go	Implements client credentials flow and token refreshing
pkg/auth/cache/cache.go	Implements token caching with refresh and invalidation
pkg/auth/authorization_tokenretriever.go	Provides functionality for exchanging auth tokens
pkg/auth/auth.go	Defines interfaces and helper functions for auth grant and token
cmd/streamnative-mcp-server/main.go	Entry point for the MCP server
README.md	Documentation and usage instructions
Other configuration/workflow files	CI/CD configuration via goreleaser, linting, and testing files

Files not reviewed (4)

• Makefile: Language not supported
• go.mod: Language not supported
• go.work: Language not supported
• go.work.sum: Language not supported

[Copilot]

The magic number 7 used to validate the regex capture groups may be fragile if the regex is updated in the future. Consider defining a constant for the expected capture count or adding a clear comment to document what this value represents.

Suggested change

	if len(match) != 7 {
	return nil, errDataURLInvalid
	if len(match) != expectedCaptureGroups {