fix(stream): respect StreamOptions config for event emission

[AlbumenJ]

No description provided.

[Copilot]

Pull request overview

This PR fixes stream event emission to properly respect StreamOptions configuration, ensuring that only requested event types are emitted to subscribers. The fix addresses Issue #265 by adding filtering checks for reasoning emissions and the final agent result event.

• Added filtering for reasoning chunk vs result emissions based on StreamOptions.shouldIncludeReasoningEmission()
• Added conditional emission of AGENT_RESULT events based on StreamOptions.shouldStream(EventType.AGENT_RESULT)

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
agentscope-core/src/main/java/io/agentscope/core/agent/StreamingHook.java	Added shouldIncludeReasoningEmission() checks to filter PostReasoningEvent (final result) and ReasoningChunkEvent (intermediate chunks) based on StreamOptions configuration
agentscope-core/src/main/java/io/agentscope/core/agent/AgentBase.java	Wrapped AGENT_RESULT event emission in a conditional check using shouldStream(EventType.AGENT_RESULT) to respect event type filtering

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[codecov]

Codecov Report

❌ Patch coverage is 42.85714% with 4 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...n/java/io/agentscope/core/agent/StreamingHook.java	0.00%	4 Missing ⚠️

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