_maybe_consolidate() now checks get_memories(subject=agent_id)
before storing. Skips if a memory of the same type (pattern/anomaly)
was created within the last hour. Prevents duplicate consolidation
entries on repeated task completion/failure events.
Also restructured branching: neutral success rates (0.3-0.8) now
return early instead of falling through.
9 new tests. 1465 total passing.
