CR: netapi Security Hardening — Rollback

Rollback Plan

Rolling back re-introduces security vulnerabilities. Only revert if patched dependencies cause functional regression.

# Revert dependency patches
git -C ~/atelier/_projects/personal/netapi revert <security-patch-commit>

# Revert exception hierarchy
git -C ~/atelier/_projects/personal/netapi revert <exception-hierarchy-commit>

# Regenerate lockfile
cd ~/atelier/_projects/personal/netapi && uv lock && uv sync --extra all