fix(ci): correct socket package verification in build-sea workflow

The socket package produces bootstrap.js, not index.mjs.
Verification was checking for wrong file causing false failure.

Socket package.json shows:
  "bin": {
    "socket": "./dist/bootstrap.js"
  }

Build produces:
  - packages/socket/dist/bootstrap.js
  - packages/socket/dist/bootstrap-smol.js

Not:
  - packages/socket/dist/index.mjs (doesn't exist)

Author: jdalton

.github/workflows/build-sea.yml

@@ -158,7 +158,7 @@ jobs:
           echo ""
           echo "Final verification:"
           ls -lh packages/bootstrap/dist/bootstrap-npm.js && echo "✓ bootstrap-npm.js present" || (echo "❌ bootstrap-npm.js missing" && exit 1)
-          ls -lh packages/socket/dist/index.mjs && echo "✓ socket package present" || (echo "❌ socket package missing" && exit 1)
+          ls -lh packages/socket/dist/bootstrap.js && echo "✓ socket bootstrap.js present" || (echo "❌ socket bootstrap.js missing" && exit 1)
 
           echo "✓ All build artifacts verified and in correct location"