Ensure thread safe access to UIViewController associated properties

[ArielDemarco]

Overview

This PR addresses a potential crash caused by threading issues when accessing or modifying UIViewController properties using Objective-C runtime associations (objc_setAssociatedObject and objc_getAssociatedObject) on a background thread.

An example: when a UIViewController with a very short lifespan (like we observe on, for example SwiftUI.UIKitNavigationController) is being deallocated, we could be adding associated objects at the same time, leading to unsafe interactions with the Objective-C runtime.

To prevent this, the code has been updated to ensure all accesses to vc.emb_identifier (a property backed by objc_setAssociatedObject) are performed on the main thread, ensuring the UIViewController is in the rendering process and not being deallocated.

Extra

Found out that LengthOfNameValidator was preventing to push some .viewLoad/.view spans due to name length. We've added a whitelist to prevent this from happening.

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

OpenSSF Scorecard

Package	Version	Score	Details

Scanned Files

[github-actions]

	Warnings
⚠️	No CHANGELOG entry added.
⚠️	No tests added / modified.

Generated by 🚫 Danger Swift against b40b729

[codecov]

Codecov Report

Attention: Patch coverage is 94.11765% with 1 line in your changes missing coverage. Please review.

Project coverage is 90.57%. Comparing base (69ed424) to head (b40b729).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...Core/Capture/UX/View/UIViewControllerHandler.swift	93.75%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #153      +/-   ##
==========================================
- Coverage   90.61%   90.57%   -0.05%     
==========================================
  Files         419      419              
  Lines       28090    28105      +15     
==========================================
+ Hits        25455    25456       +1     
- Misses       2635     2649      +14     

Files with missing lines	Coverage Δ
.../Validation/Validators/LengthOfNameValidator.swift	100.00% <100.00%> (ø)
...Core/Capture/UX/View/UIViewControllerHandler.swift	96.83% <93.75%> (+0.03%)	⬆️

... and 3 files with indirect coverage changes