fix(extensions): resolve infinite loop and strategy starvation in AutoContextMemory

[jujn]

Description

Close #989

This PR fixes issue989 where skipped tool compressions (due to low tokens) falsely reported success, causing an infinite search loop and blocking subsequent compression strategies. By changing summaryToolsMessages to return a boolean and introducing a search cursor (searchStartIndex), the memory manager now correctly advances past skipped messages. As a result, the full auto-context compression chain (Strategies 1-6) can now execute reliably without getting stuck.

Checklist

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• Code has been formatted with mvn spotless:apply
• All tests are passing (mvn test)
• Javadoc comments are complete and follow project conventions
• Related documentation has been updated (e.g. links, examples, etc.)
• Code is ready for review

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[Copilot]

Pull request overview

Fixes #989 by ensuring Strategy 1 (tool-invocation compression) only reports success when compression actually occurs, and by adding a cursor to continue scanning past tool groups that were skipped due to low tokens—allowing the full Strategy 1–6 compression chain to proceed without getting stuck.

Changes:

• Change summaryToolsMessages(...) to return a boolean indicating whether compression actually ran (vs. being skipped due to token threshold).
• Add a cursor (cursorStartIndex / searchStartIndex) to advance past skipped tool-message ranges and avoid re-selecting the same range repeatedly.
• Add/adjust unit tests to validate that compression continues when tool compression is skipped and that later tool groups can still be compressed.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
agentscope-extensions/agentscope-extensions-autocontext-memory/src/main/java/io/agentscope/core/memory/autocontext/AutoContextMemory.java	Fix Strategy 1 control flow with a boolean “actually compressed” signal and a cursor-based search to avoid reprocessing skipped tool ranges.
agentscope-extensions/agentscope-extensions-autocontext-memory/src/test/java/io/agentscope/core/memory/autocontext/AutoContextMemoryTest.java	Update configs to avoid unintended skipping in existing tests; add targeted tests for “skip due to low tokens but continue” and cursor advancement behavior.

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Codecov Report

✅ All modified and coverable lines are covered by tests.

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