Cron jobs were constructed with skip_memory=True and a hard 'memory'
toolset denial, so MEMORY.md/USER.md never loaded and the memory tool was
stripped even from per-job enabled_toolsets. That was inconsistent with
kanban/delegate/gateway agents (which all get memory) and forced users
into hacky bypasses.
- cron/scheduler.py: skip_memory=False on the cron AIAgent; drop 'memory'
from _resolve_cron_disabled_toolsets; remove _strip_cron_memory_toolset
and its call sites
- agent/agent_init.py: update stale comment referencing the cron denylist
- tests: flip pinning tests to the new contract (memory enabled, per-job
memory toolset kept, user-level denylist still wins)
- docs: cron-internals + automate-with-cron no longer claim cron has no
persistent memory