Perf: Reduce Windows VC++ redistributable detection overhead on import

[MariusStorhaug]

Summary

Optimize Windows startup path by reducing registry probe overhead for VC++ runtime detection.

Why

Module import currently performs registry checks that add cold-start latency. Successful native initialization can often be used as the practical runtime proof.

Proposed change

• Evaluate replacing or minimizing registry probing in Assert-VisualCRedistributableInstalled path.
• Favor fast-fail based on native load/init outcome where appropriate.
• Preserve actionable warning/error guidance when runtime dependencies are truly missing.

Acceptance criteria

• Windows cold-start improves or remains neutral.
• Missing-runtime scenarios still produce actionable diagnostics.
• Existing tests pass.
• No false-positive success when runtime is unavailable.