v2.0.0

• BREAKING CHANGE: Replaced concurrency, and isolates parameters with strategy-based API
• Added IsolatedProcessingStrategy pattern for better type safety and extensibility
• Added IsolatedProcessingStrategy.concurrent(), .droppable(), .restartable(), .sequential() factories
• Improved broadcast stream handling with shared isolates across listeners
• Fixed concurrency tracking issues in isolate boundaries
• Enhanced lazy initialization for better resource management

Migration example:

// Before (v1.x)
stream.isolatedMap(handler, concurrency: 3, isolates: 2)

// After (v2.x)
stream.isolatedMap(
  handler,
  strategy: IsolatedProcessingStrategy.concurrent(
    concurrency: 3,
    isolates: 2,
  ),
);