feat(session): centralize async session work through SessionRunner#6041

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edlsh wants to merge 3 commits intosst:devfrom

edlsh:feat/async-subagent-3-centralize

Commits on Dec 22, 2025

feat(session): add SessionRunner abstraction for async subagent delegation
edlsh
committed

Commits on Dec 24, 2025

feat(session): implement background job runner with queue and lifecycle events
edlsh
committed
feat(session): centralize async session work through SessionRunner
edlsh
committed