Release v0.19.4: Set useLocalBinaries = false for SPM consumers

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: sanchitmonga22

Package.swift

@@ -37,7 +37,7 @@ import Foundation
 //   ./scripts/build-swift.sh --set-remote  (sets useLocalBinaries = false)
 //
 // =============================================================================
-let useLocalBinaries = true //  Toggle: true for local dev, false for release
+let useLocalBinaries = false //  Toggle: true for local dev, false for release
 
 // Version for remote XCFrameworks (used when testLocal = false)
 // Updated automatically by CI/CD during releases