add tasks for partner creation, modification and deletion

gso/db/models.py

 """Database model definitions and table mappings for the GSO system."""
 
-import enum
-
 import structlog
 from orchestrator.db import UtcTimestamp
 from orchestrator.db.database import BaseModel
 from sqlalchemy import (
-    Enum,
     String,
     text,
 )
-from sqlalchemy.dialects.postgresql import ARRAY
 from sqlalchemy.orm import mapped_column
 
 logger = structlog.get_logger(__name__)
 
 
-class PartnerType(str, enum.Enum):
-    """Defining different types of partners in the GSO system."""
-
-    NREN = "NREN"
-    RE_PEER = "RE_PEER"
-    PUBLIC_PEER = "PUBLIC_PEER"
-    PRIVATE_PEER = "PRIVATE_PEER"
-    UPSTREAM = "UPSTREAM"
-    GEANT = "GEANT"
-
-
 class PartnerTable(BaseModel):
     """Database table for the partners in the GSO system."""
 
     __tablename__ = "partners"
 
     partner_id = mapped_column(String, server_default=text("uuid_generate_v4"), primary_key=True)
-    name = mapped_column(String, unique=True, nullable=True)
+    name = mapped_column(String, unique=True, nullable=False)
     email = mapped_column(String, unique=True, nullable=False)
-    partner_type = mapped_column(Enum(PartnerType), nullable=False)
-
-    as_number = mapped_column(
-        String, unique=True, nullable=True
-    )  # the as_number and as_set are mutually exclusive. if you give me one I don't need the other
-    as_set = mapped_column(String, nullable=True)
-    route_set = mapped_column(String, nullable=True)
-    black_listed_as_sets = mapped_column(ARRAY(String), nullable=True)
-    additional_routers = mapped_column(ARRAY(String), nullable=True)
-    additional_bgp_speakers = mapped_column(ARRAY(String), nullable=True)
 
     created_at = mapped_column(UtcTimestamp, server_default=text("current_timestamp"), nullable=False)
     updated_at = mapped_column(