feat(compose): add fallback scrape protocol for Scaphandre service

[vprashar2929]

This update modifies the Prometheus scrape config for the Scaphandre service to use the fallback scrape protocol

• Resolving an issue where Prometheus latest was unable to scrape Scaphandre service due to invalid Content-Type header in response
• Switch Prometheus to use latest

[github-actions]

🤖 SeineSailor

Here is a concise summary of the pull request changes:

Summary: This pull request updates the Prometheus scrape configuration for the Scaphandre service by switching from a specific version (v2.55.0) to the latest version of Prometheus.

Key Modifications:

• The Prometheus base image is updated to latest.
• This change resolves an issue with the latest version unable to scrape the Scaphandre service due to an invalid Content-Type header in the response.

Impact: This change may affect the external interface or behavior of the code, as the latest version could have new features or modifications that may require adjustments in the monitoring and alerting rules.

Observations/Suggestions:

• It would be beneficial to review the monitoring and alerting rules to ensure they are compatible with the latest version of Prometheus.
• Consider adding tests to verify the Scaphandre service is properly scraped by the updated Prometheus version.
• Document the changes and their potential impact on the codebase to ensure knowledge transfer and future maintenance.