fix(harness): persist evicted tool results remotely

[richuV]

Summary:

• keep tool-result eviction paths workspace-relative and route large_tool_results through RemoteFilesystemSpec
• apply the same bounded replacements to call-scoped AgentState and the already-built current ReasoningInput
• cover direct remote filesystem behavior and the full model-tool-next-model-persistent-state lifecycle

Fixes #2145

Verification: 37 focused Harness/RemoteFilesystem/eviction tests passed; real Redis strict writer and fresh reader each passed in JCode; Spotless and git diff check passed.

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[codecov]

Codecov Report

❌ Patch coverage is 73.33333% with 12 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...agent/middleware/ToolResultEvictionMiddleware.java	71.42%	6 Missing and 6 partials ⚠️

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[AgentScopeJavaBot]

🤖 AI Review

This PR fixes issue #2145 where tool-result eviction artifacts failed to persist through remote filesystem. Two root causes are addressed: (1) DEFAULT_EVICTION_PATH was an absolute path /large_tool_results that couldn't be matched by RemoteFilesystemSpec routing (which uses non-slash-prefixed prefix keys); (2) eviction replacements only applied to AgentState.contextMutable(), missing the call-scoped ReasoningInput.inputMessages(), causing the current inference to still use the original large content. The fix is clean: workspace-relative paths, routing table registration, and dual replacement logic. The changes are focused and well-scoped.

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