v4.2.0

• fix: prevent duplicate ProvidedTypeDefinition for named component aliases (#478)
• fix: formatObject correctly handles Option<T> elements in arrays (#475)
• fix: formatObject correctly handles Option<DateOnly> and Option<TimeOnly> properties (#473)
• fix: encode byte[] as base64 instead of calling ToString() in toParam (#465)
• fix: correct string enum array serialization in toQueryParams (#462)
• improve: format DateOnly/TimeOnly properties with ISO 8601 in formatObject (#468)
• perf: replace UriBuilder+ParseQueryString with StringBuilder in query construction (#457)
• refactor: deduplicate CallAsync error branch (#460)
• eng: update TypeProviders SDK for thread-safety and performance (#480)
• eng: update global.json SDK baseline from 10.0.201 to 10.0.301 (#470)
• eng: bump GitHub Actions workflows (checkout 6→7.0.1, cache 5→6, setup-dotnet 5→6, setup-node 6→7)
• eng: bump postcss 8.5.10 → 8.5.23 in docs
• test: add missing coverage for Option<byte[]>, plain Guid, and leading-slash+fragment URLs (#464)
• test: add enum query-param tests (#462)
• test: add stream-array and HTTP-fallback tests (#460)
• test: add 9 query-construction tests (500→509) (#457)