Summary of Changes

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This pull request significantly refactors the internal tool and source architecture by decoupling tool implementations from their specific source types. By introducing generic interfaces for sources, tools can now interact with various data sources through a unified contract, rather than relying on concrete implementations. This change enhances modularity, simplifies future extensions, and improves the overall maintainability of the codebase by reducing direct dependencies between components.

Highlights

• Decoupling Tool-Source Dependencies: The pull request refactors the internal architecture to decouple tool implementations from their specific source types, moving away from direct concrete dependencies.
• Introduction of compatibleSource Interfaces: New interfaces, such as compatibleSource in cloudgda.go and mysqlgetqueryplan.go, have been introduced to define the required methods for sources, promoting abstraction and a unified contract.
• Generic Source Retrieval Mechanism: A helper function, tools.GetCompatibleSource, is now utilized within tool Invoke methods to generically retrieve and cast sources to their respective compatibleSource interfaces, simplifying source management.
• Refactored Source Accessors: The cloud_gda.go file now exposes GetProjectID() and GetBaseURL() methods, making key source properties accessible via the new interface rather than direct field access.
• Updated Authorization Method Signatures: The RequiresClientAuthorization and GetAuthTokenHeaderName methods in various tools have been updated to return an error in addition to their previous return values, aligning with more robust error handling practices.

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