feat(server): add Debian 13 (Trixie) support for server validation

[matiasmagni]

Changes

• Server OS validation (app/Models/Server.php): Added Debian 13 (Trixie) support by including trixie in the list of recognized Debian version codenames. When /etc/os-release has an empty or missing ID but VERSION_CODENAME is a known Debian codename (stretch, buster, bullseye, bookworm, trixie), ID is set to debian so the server is accepted. Tightened parsing of /etc/os-release (skip empty/invalid lines) and made validateOS() return the matching SUPPORTED_OS string consistently.
• InstallPrerequisites: No change to Debian commands; existing apt flow works for Trixie. Added an explicit branch for Alpine Linux with a clear error message instead of the generic "Unsupported OS type."
• InstallDocker: Documented in getDebianDockerInstallCommand() that the fallback uses VERSION_CODENAME (e.g. trixie) for the Docker APT suite so all Debian versions, including 13, are supported.
• Tests: Added tests/Unit/ServerValidateOsSupportTest.php asserting that SUPPORTED_OS includes the debian family and that the Debian codename list used in validateOS() includes trixie and bookworm.

Issues

• fixes: [Enhancement]: Add additional server support for Debian 13 #8154

Category

• Bug fix
• New feature
• Adding new one click service
• Fixing or updating existing one click service

Screenshots or Video (if applicable)

N/A – backend validation only. Optional: screen recording of adding a Debian 13 server and running "Install Prerequisites" / Docker install without "Unsupported OS type" error.

AI Usage

• AI is used in the process of creating this PR
• AI is NOT used in the process of creating this PR

Steps to Test

• Step 1 – Run unit tests: ./vendor/bin/pest tests/Unit/ServerValidateOsSupportTest.php. Expect 2 tests, 4 assertions, all passing.
• Step 2 – (Optional, requires a Debian 13 server.) Add a new server in Coolify with SSH access to a host running Debian 13 (Trixie). Confirm the server is detected (no "Server OS type is not supported" during validation).
• Step 3 – On that server, run Install Prerequisites from the server page. Expect success and "Prerequisites installed successfully" (no "Unsupported OS type for prerequisites installation").
• Step 4 – On that server, run Docker installation if not already installed. Expect Docker to install using the Debian path (e.g. deb [arch=...] https://download.docker.com/linux/debian trixie stable).

Contributor Agreement

Important

• I have read and understood the contributor guidelines. If I have failed to follow any guideline, I understand that this PR may be closed without review.
• I have tested the changes thoroughly and am confident that they will work as expected without issues when the maintainer tests them

[github-actions]

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