02bfff7ce9
Prevents dateString.split crash when Nunjucks | date filter receives Date objects from MongoDB. Audit timestamps (createdAt, updatedAt, lastFetchedAt, etc.) now use .toISOString(). Query-used fields (published, nextFetchAt) kept as Date objects for MongoDB compatibility. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>