feat: define all 8 SQLModel tables

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

app/models/warmup.py

@@ -0,0 +1,33 @@
+"""Warmup model for the standardized warmup routine.
+
+Warmups are displayed before every workout in a fixed order.
+"""
+
+from datetime import datetime
+from typing import Optional
+
+from sqlmodel import Field, SQLModel
+
+
+class Warmup(SQLModel, table=True):
+    """A warmup exercise in the standardized routine.
+
+    Attributes:
+        id: Primary key, auto-incremented.
+        name: Warmup name (e.g., "Cat / Cow").
+        type: Category (e.g., "Thoracic Mob", "Hip Mobility").
+        reps: Rep scheme as a string (e.g., "8 reps", "8 each side").
+        form_cues: Detailed form instructions.
+        sort_order: Display order in the warmup sequence.
+        created_at: Timestamp when the record was created.
+    """
+
+    __tablename__ = "warmups"
+
+    id: Optional[int] = Field(default=None, primary_key=True)
+    name: str = Field(index=True)
+    type: str = Field(default="")
+    reps: str = Field(default="")
+    form_cues: str = Field(default="")
+    sort_order: int = Field(default=0)
+    created_at: datetime = Field(default_factory=datetime.utcnow)