Summary

• add structured registry host configuration with HTTP, skip-verify, search, basic auth, and bearer auth support
• wire registry host config through Rust, C, Go, Python, and Node SDKs
• update generated C header, SDK docs, and registry configuration guide

Tests

• cargo test -p boxlite registry_
• cargo test -p boxlite client_config_
• cargo test -p boxlite-c
• cargo check -p boxlite-python
• cargo check -p boxlite-node
• cargo clippy -p boxlite --tests -- -D warnings
• cargo clippy -p boxlite-c --tests -- -D warnings
• cargo clippy -p boxlite-python -p boxlite-node -- -D warnings
• go test -tags boxlite_dev -run TestRuntimeOptions .
• npm run build
• npm run format:check
• cmake -S sdks/c/tests -B sdks/c/tests/build && cmake --build sdks/c/tests/build
• git diff --check