rl-nginx v0.1.0-rc.2

Source-only public preview release candidate.

This candidate is immutable at commit 05cb877e16b066fabb9029a9e81207e69adeddf2.
It includes the complete B10 hardening disposition, bounded UDP ingress, the
independent steering/latency-report contract, and the architecture-portable
fairness regression.

Validation evidence:

• post-merge main workflow passed;
• all 17 required hosted PR checks passed on the final changes;
• both nginx releases, static/dynamic builds, native aarch64, public behavior,
  sanitizers, hygiene, and CodeQL passed;
• clean anonymous checkout passed static and relocated dynamic validation after
  initializing its pinned public nginx submodule;
• local focused UDP fairness, dynamic relocation, CI-gate, and specification
  consistency checks passed.

See CHANGELOG.md in the tag for the full change list. This remains preview
software and is not an ABI-stable release.