Improve validate URL

[Catharsis68]

• Fixed the issue in feature-server: where the validateURL function was not validating the URL correctly for the tts-task
• update logic to check if it's a valid URL and cover it with a test suite
• Add Span for pre cache processing time verb:precache-${task.summary}

Use Elevenlabs TTS with flash 2.5 model and the following text Handlungselemente: Die Handlung enthält Elemente von Spannung und Aufregung durch die Bodyguard-Thematik. Die Story beinhaltet ebenso das College leben.

Run npm run test:validation-utils