fix: use nullish coalescing for job data and options defaults - #1031

this.data = data || {};           // data=false → {}; data=0 → {}; data='' → {}
this.options = options || {};
this.options.timestamp = this.options.timestamp || Date.now();  // timestamp=0 → Date.now()
this.options.stacktraces = this.options.stacktraces || [];

this.data = data ?? {};
this.options = options ?? {};
this.options.timestamp = this.options.timestamp ?? Date.now();
this.options.stacktraces = this.options.stacktraces ?? [];

const job = queue.createJob(false);
await job.save();
// job.data is {} instead of false