Update timeout configuration to use time.Duration for consistency

[paskal]

No description provided.

[Copilot]

Pull Request Overview

This PR updates the timeout configuration across various modules to use time.Duration for consistency. It also refactors tests to use table-driven subtests for improved clarity and coverage.

• Updated UReadability instantiation in production and test code to use time.Duration.
• Refactored tests in readability_test.go to adopt table-driven subtests for multiple URL scenarios.
• Revised all timeout specifications in backend/main.go, backend/rest/server_test.go, and extractor packages for consistency.

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
backend/extractor/readability_test.go	Updated timeout configuration and refactored tests into a table-driven approach.
backend/main.go	Changed timeout from an integer value to a proper time.Duration for UReadability.
backend/rest/server_test.go	Updated timeout definitions to reflect the new time.Duration configuration.
backend/extractor/readability.go	Removed unnecessary multiplication with time.Second, relying directly on the already set time.Duration.
backend/extractor/pics_test.go & pics.go	Ensured timeout fields use time.Duration consistently.