Bernard Siebens
9127be0c42
TimeStampedModel goes on UUIDModel, so all 28 domain models get row birthdays in one place. Without them the dashboard can only ever describe the present: "42 members" is knowable, "members joined this month" is not, and no metric can show direction. Order dropped its own created/modified -- redeclaring a field from an abstract base is an error, and its column survives as a plain AlterField (verbose_name only), so no order data moves. Note for reading early charts: auto_now_add backfills existing rows with a single migration timestamp, so everything that predates this commit shares one birthday and will show up as a spike at that instant rather than as real history. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>