Synthesize playbooks from structured prompts and inject prior-run context.

Legacy jobs with empty recipes (e.g. dying-gasp algorithms in prompt_text) now compile into durable playbooks on create/enqueue, and each run gets a short previous-run summary for continuity.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_scheduler_viewer_username.py

@@ -69,6 +69,9 @@ class ResolveScheduledViewerUsernameTests(unittest.TestCase):
         job.specialist = "generalist"
         job.created_by_user_id = str(self.member["id"])
         job.schedule_kind = "interval"
+        job.recipe_json = "{}"
+        job.source_session_id = ""
+        job.name = "stretch"
 
         run = MagicMock()
         run.id = "run-1"