fix(task): skip saveClineMessages when history task aborts before messages load (#1181)

* fix(task): skip saveClineMessages when history task aborts before messages load

* test: strengthen resume-eviction-race assertions and type mock provider

* test: add fallback mock for second getSavedClineMessages read in resume-eviction spec

* fix(task): prevent saving unhydrated history messages during abort

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Co-authored-by: Naved  Merchant <naved.merchant@gmail.com>