v0.2.7: Isolated Subagent Results

v0.2.7 restores supervised memory operations on DSH 0.1.0-rc.6 while preserving strict subagent tool isolation.

#Fixed

• Each delegated Mnemon run now registers a unique inherited result tool whose parameters exactly match the operation's result schema.
• The one-run result tool is explicitly admitted by the existing toolFilter; recall, write, review, placement, migration, compaction, Document archive, and metadata tasks keep their original hard tool allowlists.
• The parent validates the result schema and child identity, rejects duplicate or missing completion calls, handles nested code-mode completion, and unregisters the tool and event listener after the run.
• This replaces the dependency on DSH's late-injected structured_output path that could become unreachable after child tool filtering and cause memory subagent stopped with error.

#Compatibility

• The fix is entirely inside dsh-mnemon and does not require a DSH change.
• Public tool contracts, storage layouts, Memory Space schemas, Provider configuration, and persisted data are unchanged.
• The issue affected the shared delegated-result path, so the fix applies to all supervised Mnemon operations rather than only mnemon_recall and mnemon_remember.

#Verification

• The complete suite passes with 334 tests; one Windows-only smoke test is skipped only on non-Windows local runs.
• Deterministic builds, Headless activation, package checks, and CI on Ubuntu and Windows pass.
• Real WebUI testing covered Agent Query and a conversation-level mnemon_recall: the child used only its admitted read tools, invoked its unique result tool, and returned the validated structured result to the parent Agent.

#Upgrading

Update dsh-mnemon and restart the affected DSH profile. No data migration is required.

See the v0.2.6 release notes for the previous patch release.