fix(harness): offload memory flush and compaction work

[guslegend0510]

Moves memory flush, JSONL offload, and compaction-adjacent workspace IO onto boundedElastic. Also fixes a core ToolCallParam builder regression and keeps agentscope-extensions POM aligned so harness tests compile.

Verified with:

mvn -s D:\Code??\agentscope-java\codex-settings.xml -pl agentscope-harness -am "-Dtest=MemoryFlushManagerTest,ConversationCompactorTest" test "-Dspotless.check.skip=true"

[LearningGp]

Looks like this branch has some noise/unrelated commits. Could you please pull the latest from main and recreate your branch, or interactive rebase to remove the extra changes?

[AgentScopeJavaBot]

🤖 AI Review

This is a massive refactoring PR (2366 files, +128450/-214619) that reverts ReActAgent state management from AgentState back to InMemoryMemory, removes the Middleware system in favor of Hooks, simplifies Toolkit.registerToolMethod, and un-deprecates a large number of classes previously marked for removal in 2.0.0. The PR title ("offload memory flush and compaction work") significantly understates the scope — the actual changes constitute a major architectural pivot. Key concerns: (1) mass removal of @Deprecated(forRemoval=true) annotations without migration guidance creates API stability confusion, (2) shared mutable state via toolkit.setInternalChunkCallback() in acting(), (3) non-atomic InMemoryMemory.loadFrom(), and (4) potential logic gap in summarizing() pending tool handling. Recommend addressing the critical API compatibility issue and the concurrency concerns before merge.

(inline comments could not be attached — line numbers fell outside PR hunks. See archived report.)

[codecov]

Codecov Report

❌ Patch coverage is 67.92453% with 17 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...scope/harness/agent/memory/MemoryFlushManager.java	66.66%	3 Missing and 5 partials ⚠️
...arness/agent/middleware/MemoryFlushMiddleware.java	50.00%	5 Missing ⚠️
...ent/filesystem/local/LocalFilesystemWithShell.java	60.00%	1 Missing and 1 partial ⚠️
...in/java/io/agentscope/core/tool/ToolCallParam.java	88.88%	0 Missing and 1 partial ⚠️
...java/io/agentscope/harness/agent/HarnessAgent.java	75.00%	0 Missing and 1 partial ⚠️

📢 Thoughts on this report? Let us know!

[guslegend0510]

@LearningGp 我已经完成了您前面说的变更，麻烦您看一下谢谢