merge: wave 2 executor (01-02) into main

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

paperclip-reference/packages/db/src/migrations/0002_big_zaladane.sql

@@ -0,0 +1 @@
+ALTER TABLE "heartbeat_runs" ADD CONSTRAINT "heartbeat_runs_wakeup_request_id_agent_wakeup_requests_id_fk" FOREIGN KEY ("wakeup_request_id") REFERENCES "public"."agent_wakeup_requests"("id") ON DELETE no action ON UPDATE no action;