Adding sync with imported parts

app/models/__init__.py

@@ -1,6 +1,6 @@
 """Import all models so they register with ``Base.metadata``."""
 
-from app.models.associations import role_permissions, user_roles
+from app.models.associations import augmented_part_imported_parts, role_permissions, user_roles
 from app.models.audit_log import AuditLog
 from app.models.augmented_part import AugmentedPart
 from app.models.imported_part import ImportedPart
@@ -35,6 +35,7 @@ __all__ = [
     "Role",
     "UncThread",
     "User",
+    "augmented_part_imported_parts",
     "role_permissions",
     "user_roles",
 ]

app/models/associations.py

@@ -1,6 +1,6 @@
-"""Many-to-many association tables for RBAC."""
+"""Many-to-many association tables."""
 
-from sqlalchemy import Column, ForeignKey, Table
+from sqlalchemy import Column, ForeignKey, String, Table
 
 from app.core.database import Base
 
@@ -21,3 +21,19 @@ role_permissions = Table(
         primary_key=True,
     ),
 )
+
+augmented_part_imported_parts = Table(
+    "augmented_part_imported_parts",
+    Base.metadata,
+    Column(
+        "augmented_part_id",
+        ForeignKey("augmented_parts.id", ondelete="CASCADE"),
+        primary_key=True,
+    ),
+    Column(
+        "imported_part_id",
+        String,
+        ForeignKey("imported_parts.InventoryID", ondelete="CASCADE"),
+        primary_key=True,
+    ),
+)

app/models/augmented_part.py

@@ -2,6 +2,8 @@ from sqlalchemy import ForeignKey, String
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from app.core.database import Base
+from app.models.associations import augmented_part_imported_parts
+from app.models.imported_part import ImportedPart
 from app.models.manufacturer import Manufacturer
 from app.models.part_colour import PartColour
 from app.models.part_type import PartType
@@ -31,6 +33,11 @@ class AugmentedPart(Base):
         ForeignKey("sub_part_types.id", ondelete="SET NULL"), nullable=True, default=None
     )
 
+    # linked imported parts — not eagerly loaded; used by sync service only
+    imported_parts: Mapped[list[ImportedPart]] = relationship(
+        secondary=augmented_part_imported_parts, lazy="select"
+    )
+
     colour: Mapped[PartColour] = relationship(lazy="selectin")
     manufacturer: Mapped[Manufacturer] = relationship(lazy="selectin")
     scope_model: Mapped[ScopeModel | None] = relationship(lazy="selectin")