Initial import of LWLT AIBOT platform

control-plane/migrations/006_task_outcomes.sql

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+ALTER TABLE tasks
+  ADD COLUMN IF NOT EXISTS success_receipt jsonb,
+  ADD COLUMN IF NOT EXISTS success_receipt_at timestamptz,
+  ADD COLUMN IF NOT EXISTS error_summary jsonb,
+  ADD COLUMN IF NOT EXISTS error_summary_at timestamptz;
+
+CREATE INDEX IF NOT EXISTS tasks_success_receipt_idx
+  ON tasks (organization_id, success_receipt_at DESC)
+  WHERE success_receipt IS NOT NULL;
+
+CREATE INDEX IF NOT EXISTS tasks_error_summary_idx
+  ON tasks (organization_id, error_summary_at DESC)
+  WHERE error_summary IS NOT NULL;