feat: fence periodic turn daemon execution

packages/infra/prisma/migrations/20260725002000_add_turn_daemon_lease/migration.sql

@@ -0,0 +1,9 @@
+CREATE TABLE "turn_daemon_lease" (
+    "profile" TEXT NOT NULL,
+    "owner_id" TEXT NOT NULL,
+    "lease_until" TIMESTAMP(3) NOT NULL,
+    "fencing_epoch" BIGINT NOT NULL DEFAULT 1,
+    "heartbeat_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "turn_daemon_lease_pkey" PRIMARY KEY ("profile")
+);