Add Linux Inspector and installer improvements

[mahbd]

Summary

• Linux Inspector: New installer service (linux_inspector.py) that checks and installs all system packages and Python libraries required for Linux desktop automation. Supports apt, dnf, and pacman package managers, including special handling for AlmaLinux/RHEL 9.
• Linux category in installer route: Registers the Linux Inspector as a new category (Linux) in route.py so it appears in the installer UI alongside Android, Web, Windows, and macOS services.
• Status checks bypass semaphore: Refactored _run_job → _execute_job so that status action jobs skip the concurrency semaphore, preventing fast read-only status checks from queuing behind long-running installs.
• Native categories patching: Added NATIVE_CATEGORIES = {"Linux", "Windows", "MacOS"} and included them in PATCH_CATEGORIES so node-side patch/forward logic covers desktop platform installers.
• System info endpoint: Added GET /installer/system-info endpoint and system_info job action backed by get_formatted_system_info().
• Linux app listing: Extended server/linux.py with LinuxAppInfo model and supporting routes for exposing installed application metadata.

Test plan

• On a fresh Linux machine (Ubuntu/apt), run the Linux Inspector status check — it should correctly detect missing packages.
• Run the Linux Inspector install — verify all packages in PACKAGES["apt"] and PIP_PACKAGES are installed.
• Test on a dnf-based distro (Fedora/AlmaLinux) and a pacman-based distro (Arch) to confirm package manager detection works.
• Submit concurrent status + install jobs and confirm status jobs resolve immediately without waiting for the install semaphore.
• Hit GET /installer/system-info and verify a valid JSON response is returned.
• Confirm the Linux Inspector card appears in the installer UI under the "Linux" category.

🤖 Generated with Claude Code

[Antu7]

🔎 ZeuZ PR Review

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Overview	Value
Agents	✅ 4 completed
Suggestions	💡 4

Agent breakdown

→ General Review

Status: ✅ Completed
Suggestions: 1 suggestion

Mostly solid PR: Linux support and the installer/status routing look coherent, but I found one correctness risk in the new Alma/RHEL 9 path that can report success too early.

→ Security Review

Status: ✅ Completed
Suggestions: 0 suggestions

No high-signal security findings in this PR diff. The new Linux inspector and installer paths follow the existing subprocess-based patterns, and I didn’t find a clear injection, authz, or secret-handling regression to flag.

→ Performance Review

Status: ✅ Completed
Suggestions: 1 suggestion

Found one performance issue: the new status endpoint now shells out to Git on every request, which is avoidable overhead on a hot path.

→ Testing Review

Status: ✅ Completed
Suggestions: 2 suggestions

The PR adds several new Linux- and installer-facing code paths, but I couldn’t find any corresponding tests in the repository. The main risk is regression in the new Linux Inspector flow and the new system-info/version endpoints going unnoticed.

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