Add tests coverage visibility

[joaopaulovieira]

Changes

This PR improves the test workflow and coverage visibility for the project.

Makefile

• Enhanced test target:
  • The test target now runs all tests with coverage enabled (go test ./... -coverprofile=coverage.out.tmp).
  • Filters out coverage results for /mocks/ to produce a cleaner coverage.out file.
  • Displays a coverage summary using go tool cover -func=coverage.out.
• New target: local-coverage:
  • Runs the test target and generates an HTML coverage report (coverage.html).
  • Prints a message instructing the user to open the HTML file in their browser.

Outputs

local coverage report

How to Test

• Run make test to see the coverage summary in the terminal.
• Run make local-coverage to generate and view the HTML coverage report.