Reduce delay to make build faster. Fix unsafe json serialization.

[Thorium]

Just minor tweaks.

[github-actions]

Test Results

   12 files  ±0     12 suites  ±0   36m 28s ⏱️ + 3m 8s
  451 tests ±0    450 ✅ ±0  1 💤 ±0  0 ❌ ±0 
1 287 runs  ±0  1 284 ✅ ±0  3 💤 ±0  0 ❌ ±0 

Results for commit 13b3dbd. ± Comparison against base commit d7c71ed.

♻️ This comment has been updated with latest results.

[Copilot]

Pull Request Overview

This PR improves security and performance by updating deprecated cryptographic APIs, fixing insecure JSON deserialization, and reducing polling delays.

Key changes:

• Replaces deprecated AesManaged with Aes.Create() in vault encryption
• Adds secure JSON deserialization settings to prevent type name handling attacks
• Reduces process wait polling interval from 1000ms to 100ms

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/app/Fake.Core.Vault/Vault.fs	Updates AES encryption API and secures JSON deserialization with explicit settings
src/app/Fake.Core.Process/Process.fs	Reduces process polling delay and removes BOM character

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