feat: define all 8 SQLModel tables

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/models/__init__.py

@@ -0,0 +1,24 @@
+"""SQLModel model definitions for SneakySwole.
+
+All 8 tables are defined here and re-exported for convenient imports.
+"""
+
+from app.models.user import User
+from app.models.exercise import Exercise
+from app.models.warmup import Warmup
+from app.models.workout_day import WorkoutDay
+from app.models.user_exercise_program import UserExerciseProgram
+from app.models.workout_session import WorkoutSession
+from app.models.workout_log import WorkoutLog
+from app.models.progress_log import ProgressLog
+
+__all__ = [
+    "User",
+    "Exercise",
+    "Warmup",
+    "WorkoutDay",
+    "UserExerciseProgram",
+    "WorkoutSession",
+    "WorkoutLog",
+    "ProgressLog",
+]