revert(cron): return cron job storage to per-profile (reverts #32117 + #50993) (#51116)

* Revert "fix(cron): scope job execution to its owning profile (#32091 follow-up) (#50993)"

This reverts commit 660e36f097.

* Revert "fix(cron): anchor cron storage at the default root home (not the active profile)"

This reverts commit a5c09fd176.

tools/cronjob_tools.py

@@ -539,7 +539,6 @@ def cronjob(
     enabled_toolsets: Optional[List[str]] = None,
     workdir: Optional[str] = None,
     no_agent: Optional[bool] = None,
-    profile: Optional[str] = None,
     task_id: str = None,
 ) -> str:
     """Unified cron job management tool."""
@@ -606,7 +605,6 @@ def cronjob(
                 enabled_toolsets=enabled_toolsets or None,
                 workdir=_normalize_optional_job_value(workdir),
                 no_agent=_no_agent,
-                profile=_normalize_optional_job_value(profile),
             )
             _notify_provider_jobs_changed_safe()
             return json.dumps(