feat: introduce golangci-lint

[EItanya]

No description provided.

[Copilot]

Pull Request Overview

This PR introduces golangci-lint to the project by adding linter configuration and addressing various code issues identified by the linter. The primary purpose is to improve code quality and consistency across the Go codebase by implementing automated static analysis.

• Adds golangci-lint configuration file and GitHub Actions workflow for automated linting
• Fixes numerous error handling issues by adding //nolint:errcheck directives where appropriate
• Removes unused variables and functions, and simplifies code constructs
• Corrects import aliases and function references for consistency

Reviewed Changes

Copilot reviewed 36 out of 36 changed files in this pull request and generated 2 comments.

File	Description
go/.golangci.yaml	Adds golangci-lint configuration with standard linters enabled
.github/workflows/ci.yaml	Adds GitHub Actions job for running golangci-lint
go/Makefile	Updates golangci-lint version to v2.4.0 and import path
Multiple Go files	Adds //nolint:errcheck directives and removes unused code

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

The method call should be m.ObjectMeta.DeepCopy() instead of m.DeepCopy(). The current code is calling DeepCopy on the entire mockObject instead of just the ObjectMeta field.

Suggested change

	ObjectMeta: *m.DeepCopy(),
	ObjectMeta: *m.ObjectMeta.DeepCopy(),

[Copilot]

The error handling is checking for an error from the NewHTTPServer call, but the error variable err was not declared or assigned from that function call. The NewHTTPServer call on line 438-444 should assign its return value to include the error.