Refactor models and services in A76 module

- Updated GBultoService to use models.Package instead of models.GBulto.
- Refactored Part model to use SQLAlchemy 2.0 style with Mapped and mapped_column.
- Added timestamps (created_at, updated_at, deleted_at) to various pedimento models.
- Improved relationships and foreign key constraints in pedimento models.
- Updated PermissionRuleOct and Seal models to use Mapped and mapped_column.
- Changed DTO configuration from orm_mode to from_attributes for better compatibility.
- Removed obsolete models (models.py and models_ped.py) from the repository.

backend/api/v1/modules/a76/fraction_rule_octave/models.py

@@ -1,11 +1,19 @@
-from sqlalchemy import Column, String, Integer, ForeignKey
+from sqlalchemy import Integer, String, ForeignKey, PrimaryKeyConstraint, ForeignKeyConstraint, UniqueConstraint
+from sqlalchemy.orm import Mapped, mapped_column
 from core.database import Base
 
+
 class FractionRuleOctave(Base):
     __tablename__ = "fraction_rule_octave"
-    __table_args__ = {"schema": "a76"}
-
-    permission = Column(String(20), primary_key=True, nullable=False)
-    line = Column(Integer, nullable=False)
-    fraction = Column(String(10), nullable=False)
-    tenant_id = Column(String, ForeignKey("a76.tenants.id"), nullable=False)
+    __table_args__ = (
+        PrimaryKeyConstraint('id', name='fraction_rule_octave_pkey'),
+        UniqueConstraint('permission', 'line', 'fraction', name='uq_fraction_rule_octave_permission_line_fraction'),
+        ForeignKeyConstraint(['tenant_id'], ['a76.tenants.id'], name='fk_fraction_rule_octave_tenant'),
+        {"schema": "a76"}
+    )
+    
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    permission: Mapped[str] = mapped_column(String(20))
+    line: Mapped[int] = mapped_column(Integer)
+    fraction: Mapped[str] = mapped_column(String(10))
+    tenant_id: Mapped[int] = mapped_column(Integer, nullable=False, index=True)