[workouts] Add the base for a workouts tracking app

PROJECT.org

@@ -698,25 +698,25 @@ The Edit log form should have from top to bottom:
 *** Description
 
 ** TODO [#A] Add trends tests for concurrent trends :trends:tests:concurrent:
-** TODO [#B] Add workouts app with exercise catalog and workout routines :workouts:feature:
+** DONE [#B] Add workouts app with exercise catalog and workout routines :workouts:feature:
 :PROPERTIES:
 :ID:       ca613753-d203-4429-b062-36e3312bca82
 :END:
 
 *** Description
 
-Add a `workouts` Django app so we can scrobble gym sessions.
+Added a `workouts` Django app so we can scrobble gym sessions.
 
-- New `Exercise` model with the wrkout/exercises.json catalog, imported via
-  `python manage.py import_wrkout_exercises`. Image files come from inside the
-  tarball and are stored via ImageKit specs.
+- New `Exercise` model with the wrkout/exercises.json catalog (873 exercises),
+  imported via `python manage.py import_wrkout_exercises`. Image files come from
+  inside the tarball and are stored via ImageKit specs.
 - New `WorkoutRoutine` model (ScrobblableMixin, media_type_label "Workout"),
   scrobbled through the existing Scrobble system with a `workout_routine` FK and
   `WorkoutLogData` storing sets/reps/weight per exercise plus duration, bodyweight
   and RPE.
 - Weights are stored canonically in kg; the profile's `weigh_in_units` setting
   drives form input and display units. A generic
-  `apply_media_unit_conversions` helper in scrobbles/utils.py should handle both
+  `apply_media_unit_conversions` helper in scrobbles/utils.py handles both
   drinks (`size_ml`) and workout weights, fixing the old GET-only drinks
   conversion so imperial POSTs store kg.
 - Templates, admin, DRF viewsets (`exercises`, `workout-routines`), MCP tools,