feat: anonId from app args

[NickKhalow]

Pull Request Description

What does this PR change?

1. Added a propagation for anon_id from IAppArgs to RustSegmentAnalyticsService.
2. Improved LaunchTraits. LaunchTraits is immutable with an explicit ctor in this version.

Test Instructions

Prerequisites

• Get access to the segment admin panel

Test Steps

Windows

1. Find your ID at C:\Users\{user_name}\AppData\Roaming\config.json (It should appear after you launched DCL launcher once)
2. Launch game with command Decentraland.exe --launcher_anonymous_id YOUR_ID
3. Validate that your id is displayed in segment's debugger from unity main source

MacOS

1. Find your ID at ~/Library/Application\ Support/config.json (It should appear after you launched DCL launcher once)
2. Launch game with command open Decentraland.app --args --launcher_anonymous_id YOUR_ID
3. Validate that your id is displayed in segment's debugger from unity main source

Additional Testing Notes

• Note any edge cases to verify - Unknown
• Mention specific areas that need careful testing - Unknown
• List known limitations or potential issues - If you launch the game from the launcher normally you won't get the right anon id because the launcher uses latest main version by default

Quality Checklist

• [+] Changes have been tested locally
• [+] Performance impact has been considered - No significant performance changes

Code Review Reference

Please review our Code Review Standards before submitting.

[github-actions]

Windows and Mac build successfull in Unity Cloud! You can find a link to the downloadable artifact below.

Name	Link
Commit	de56f5f
Logs	https://github.com/decentraland/unity-explorer/actions/runs/13630154730
Download Windows	https://github.com/decentraland/unity-explorer/suites/35119965253/artifacts/2681226837
Download Windows S3	https://explorer-artifacts.decentraland.org/@dcl/unity-explorer/branch/feat/same-anon-id/Decentraland_windows64.zip
Download Mac	https://github.com/decentraland/unity-explorer/suites/35119965253/artifacts/2681191382
Download Mac S3	https://explorer-artifacts.decentraland.org/@dcl/unity-explorer/branch/feat/same-anon-id/Decentraland_macos.zip
Built on	2025-03-03T12:17:38Z

[DafGreco]

✔️ PR reviewed and approved by QA on both platforms following instructions playing both happy and un-happy path

Regressions for this ticket had been performed in order to verify that the normal flow is working as expected:

• ✅ Backpack and wearables in world
• ✅ Emotes in world and in backpack
• ✅Teleport with map/coordinates/Jump In
• ✅ Profile card
• ✅ Camera
• ✅ Skybox
• ✅ Settings

Evidence of the PR's functionality: