2.66.1

(chore): Bump the C# SDK and C# model generator containers’ Node base image from node:22.22-alpine3.23 to node:24.15-alpine3.23. Aligns the generators with the rest of the Fern generator containers on a single Node major version (Node 24) and picks up Node 24’s CVE patches. The bundled npm 11.12.1 in node:24.15 already ships patched brace-expansion@5.0.4, so the C# SDK’s brace-expansion 2.0.3 replacement step is removed. The ip-address and picomatch patches are retained because the bundled versions in node:24.15 (10.1.0 and 4.0.3 respectively) are still vulnerable.