feat(cyborg): complete CAGE-2 example pack

[Brad-Edwards]

Summary

Complete the bounded CAGE-2 research example as a release-checkable installed pack while preserving RAES authority and the federated catalog boundary.

Requirement UIDs

• (none — bug/refactor/maintenance run; see Traceability section below)

Related Issues

Closes #21

ADR Impact

• ADR-069
• ADR-003

Changes

• Complete the installed cage2-research pack with compatibility, provenance, and golden-readiness metadata, then reseal its content manifest.
• Exercise the packaged example through the published content-CI and release-check command surfaces.
• Pin the CybORG qualification build backend so recorded wheel identities remain reproducible across tool releases.
• Document the adapter/catalog boundary and researcher validation commands.

Test Plan

• Unit tests pass
• Integration tests pass if applicable
• Configured completion command passes
• No coverage regression

Canonical make verify and make policy passed, including clean-install distribution probes, published pack content/release checks, and CybORG qualification replay.

Ground Control Checks

• Configured repository policy command passes
• Pre-push code review and test-quality review completed; all findings fixed or dispositioned

Traceability

• IMPLEMENTS: feat(cyborg): add a CAGE-2 example environment pack #21 ← src/raes_adapters/cyborg/examples/cage2-research/, feat(cyborg): add a CAGE-2 example environment pack #21 ← tools/verify_cyborg_qualification.py
• TESTS: feat(cyborg): add a CAGE-2 example environment pack #21 ← tests/test_researcher_cli.py, feat(cyborg): add a CAGE-2 example environment pack #21 ← tests/test_cyborg_qualification.py

Checklist

• Code follows the project's coding standards
• Changelog: owned by Release Please (generated from the Conventional Commit PR title; no per-PR fragment)
• Architectural docs updated if stack, package structure, or key behaviors changed

Documentation

Updated: see diff.