fix: add node-pty binaries to macOS code signing list

Fixes notarization failures by signing pty.node and spawn-helper
for both darwin-x64 and darwin-arm64 architectures.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: abose

src-build/mac/filesToSign

@@ -26,3 +26,11 @@ src-tauri/src-node/node_modules/@img/sharp-darwin-arm64/lib/sharp-darwin-arm64.n
 src-node/node_modules/@img/sharp-darwin-arm64/lib/sharp-darwin-arm64.node
 src-tauri/src-node/node_modules/@img/sharp-libvips-darwin-arm64/lib/libvips-cpp.42.dylib
 src-node/node_modules/@img/sharp-libvips-darwin-arm64/lib/libvips-cpp.42.dylib
+src-tauri/src-node/node_modules/node-pty/prebuilds/darwin-x64/pty.node
+src-node/node_modules/node-pty/prebuilds/darwin-x64/pty.node
+src-tauri/src-node/node_modules/node-pty/prebuilds/darwin-x64/spawn-helper
+src-node/node_modules/node-pty/prebuilds/darwin-x64/spawn-helper
+src-tauri/src-node/node_modules/node-pty/prebuilds/darwin-arm64/pty.node
+src-node/node_modules/node-pty/prebuilds/darwin-arm64/pty.node
+src-tauri/src-node/node_modules/node-pty/prebuilds/darwin-arm64/spawn-helper
+src-node/node_modules/node-pty/prebuilds/darwin-arm64/spawn-helper