修复 harness 中 memory glob 路径归一化问题

[guslegend0510]

概述

修复 MemoryConsolidator 在处理 memory/*.md 时对路径归一化不一致的问题，避免本地文件系统返回绝对路径或 Windows 路径时，根目录下的日记文件被漏读、漏合并。

变更内容

• 新增 WorkspaceManager.toWorkspaceRelativePath(...)，统一把文件系统返回的路径转换为 workspace 相对路径。
• MemoryConsolidator 在读取 daily ledger 时，先将 glob 结果归一化，再进行过滤、排序和读取。
• 优化 fileName(...)，兼容 Windows 路径分隔符。
• 增加回归测试，覆盖 LocalFilesystem 下根目录 memory/2026-05-20.md 的合并场景。

验证

• mvn -s codex-maven-settings.xml -pl agentscope-harness -am "-Dtest=MemoryConsolidatorFilesystemTest,FilesystemGlobTest" test

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[codecov]

Codecov Report

❌ Patch coverage is 61.53846% with 15 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...cope/harness/agent/workspace/WorkspaceManager.java	60.86%	5 Missing and 4 partials ⚠️
...scope/harness/agent/memory/MemoryConsolidator.java	62.50%	4 Missing and 2 partials ⚠️

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