[FEAT repo-guard] - Modernize Go Idioms and Error Handling

[onuryilmaz]

[FEAT repo-guard] - Modernize Go Idioms and Error Handling

Description

Refactor the codebase to use modern Go 1.26 idioms, such as errors.AsType, slices.Contains, and the for i := range n loop. Standardize on any instead of interface{}.

Labels

• feature
• modernization
• development

User Story

As a Developer I can work with a modern and clean codebase, so that maintainability and readability are improved.

Benefit

Improves code maintainability, readability, and takes advantage of compiler optimizations.

Acceptance Criteria

• Codebase is refactored to use errors.AsType.
• Manual loops are replaced with slices package functions where appropriate.
• for i := range n is used for simple loops.
• any is used instead of interface{}.
• omitzero is used instead of omitempty where applicable.
• Project compiles and tests pass after refactoring.