v1.2.1 - Security Hardening & Test Suite Enhancements

Security Hardening

• HTTPS Enforcement: Option to block plain HTTP requests.
• SSRF Protection: Option to block private/loopback IP ranges.
• Path Traversal: Enhanced validation against null-byte and encoded dot-segment injection.

Test Suite Enhancements

• 100+ new test cases across unit, security, and integration categories.
• Multi-stage workflow verification (Download -> Encrypt -> Dart Finalizer).
• High-load stress testing (30+ concurrent tasks).

Native Improvements

• Android: Hard isolate timeouts to prevent memory leaks.
• Android: Batch deletion for task store maintenance.
• Observability: New type-safe WorkManagerLogger interface.

Fixed

• Migration Tool: Fixed missing executable for dart run native_workmanager:migrate (#14).