feat(backend): modèles SQLModel (10 tables)

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

backend/app/models/garden.py

@@ -0,0 +1,53 @@
+from datetime import datetime
+from typing import Optional
+from sqlmodel import Field, SQLModel
+
+
+class Garden(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    nom: str
+    description: Optional[str] = None
+    type: str = "plein_air"  # plein_air | serre | tunnel
+    latitude: Optional[float] = None
+    longitude: Optional[float] = None
+    altitude: Optional[float] = None
+    adresse: Optional[str] = None
+    exposition: Optional[str] = None
+    ombre: Optional[str] = None  # ombre | mi-ombre | plein_soleil
+    sol_type: Optional[str] = None
+    sol_ph: Optional[float] = None
+    grille_largeur: int = 6
+    grille_hauteur: int = 4
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+    updated_at: datetime = Field(default_factory=datetime.utcnow)
+
+
+class GardenCell(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    garden_id: int = Field(foreign_key="garden.id", index=True)
+    col: int
+    row: int
+    libelle: Optional[str] = None
+    largeur_m: Optional[float] = None
+    hauteur_m: Optional[float] = None
+    etat: str = "libre"  # libre | occupe
+    notes: Optional[str] = None
+
+
+class GardenImage(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    garden_id: int = Field(foreign_key="garden.id", index=True)
+    filename: str
+    caption: Optional[str] = None
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+
+
+class Measurement(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    garden_id: int = Field(foreign_key="garden.id", index=True)
+    temp_air: Optional[float] = None
+    temp_sol: Optional[float] = None
+    humidite_air: Optional[float] = None
+    humidite_sol: Optional[float] = None
+    source: str = "manuel"  # manuel | capteur
+    ts: datetime = Field(default_factory=datetime.utcnow)