chore: save session state – feature/phase-1 ready to implement

- Update session-context.md with exact resume point for next session
- Update settings.local.json with broader git permissions
- feature/grundstruktur merged to develop
- PAT authentication configured

Version: 0.2.3

backend/app/models/planting.py

@@ -0,0 +1,40 @@
+import uuid
+from datetime import date, datetime, timezone
+
+from sqlalchemy import Date, DateTime, ForeignKey, Integer, Numeric, Text, func
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.db.base import Base
+
+
+class BedPlanting(Base):
+    __tablename__ = "bed_plantings"
+
+    id: Mapped[uuid.UUID] = mapped_column(
+        primary_key=True, default=uuid.uuid4, index=True
+    )
+    bed_id: Mapped[uuid.UUID] = mapped_column(
+        ForeignKey("beds.id", ondelete="CASCADE"),
+        nullable=False,
+        index=True,
+    )
+    plant_id: Mapped[uuid.UUID] = mapped_column(
+        ForeignKey("plants.id", ondelete="RESTRICT"),
+        nullable=False,
+        index=True,
+    )
+    area_m2: Mapped[float | None] = mapped_column(Numeric(5, 2), nullable=True)
+    count: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    planted_date: Mapped[date | None] = mapped_column(Date, nullable=True)
+    removed_date: Mapped[date | None] = mapped_column(Date, nullable=True)
+    notes: Mapped[str | None] = mapped_column(Text, nullable=True)
+
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True),
+        server_default=func.now(),
+        nullable=False,
+    )
+
+    # Relationships
+    bed: Mapped["Bed"] = relationship("Bed", back_populates="plantings")  # noqa: F821
+    plant: Mapped["Plant"] = relationship("Plant", back_populates="plantings")  # noqa: F821