* fix(active-memory): share one recall per run across retries
Register in-flight recalls per ctx.runId so overlapping or changed-prompt
attempts join a single execution, and gate replacement recalls on settled
timeout cleanup. Entries clear on agent_end. Fixes#106957.
* fix(active-memory): evict rejected recall entries
* test(active-memory): clarify run result retention
* test(active-memory): complete recall result fixture