Fstream url get

[carlosmiei]

• relates to There is no getFStreamUrl #957

[Copilot]

Pull Request Overview

This PR refactors futures stream URL logic by extracting the conditional URL selection into a dedicated method. This improves code consistency and maintainability by following the existing pattern used for other stream URLs.

• Adds a new getFStreamUrl() method that encapsulates test vs production URL selection logic
• Replaces three instances of inline ternary operations with calls to the new method

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