SIMD Refactor: Merge simd-dev into dev (#55)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: aider (openrouter/anthropic/claude-sonnet-4) <aider@aider.chat>
Co-authored-by: Warp <agent@warp.dev>

.github/codeql/codeql-config.yml

@@ -4,19 +4,8 @@ queries:
   - uses: security-and-quality
   - uses: security-extended
 
-paths-ignore:
-  - '**/test/**'
-  - '**/tests/**'
-  - '**/*.test.cs'
-  - '**/obj/**'
-  - '**/bin/**'
-  - '**/docs/**'
-
 query-filters:
   - exclude:
       problem.severity:
         - warning
         - recommendation
-
-paths:
-  - src