Add SDK v2 telemetry core

[bmehta001]

Summary

Adds SDK v2 telemetry core plumbing for Foundry Local:

• always-build 1DS telemetry backend with CI/env/config upload gating
• startup ProcessInfo and hardware inventory metadata
• action, error, model/audio usage, download, catalog, and EP telemetry events
• stable privacy-preserving device ID handling and telemetry redaction
• user-agent attribution across C++, C#, JS, and Python SDK entry points
• download/EP/status classification for client errors, cancellation, dependency failures, and timeouts
• updated privacy documentation and CI telemetry opt-out

Validation

• python sdk_v2/cpp/build.py --build --config RelWithDebInfo --parallel 4
• focused C++ telemetry/download/EP/web-service/API tests
• python -m pytest sdk_v2/python/test/unit/test_configuration.py -q
• npm run build:ts in sdk_v2/js
• local material review loop: current final pass reported no material findings

Notes

C# solution build is still blocked by the existing NU1603 warning-as-error dependency resolution issue for Betalgo.Ranul.OpenAI / Microsoft.Extensions.Http.