refactor(skills): reorganize imports and improve code formatting

backend/app/models/__init__.py

@@ -11,15 +11,15 @@ from app.models.board_onboarding import BoardOnboardingSession
 from app.models.board_webhook_payloads import BoardWebhookPayload
 from app.models.board_webhooks import BoardWebhook
 from app.models.boards import Board
-from app.models.gateways import Gateway
 from app.models.gateway_installed_skills import GatewayInstalledSkill
+from app.models.gateways import Gateway
 from app.models.marketplace_skills import MarketplaceSkill
-from app.models.skill_packs import SkillPack
 from app.models.organization_board_access import OrganizationBoardAccess
 from app.models.organization_invite_board_access import OrganizationInviteBoardAccess
 from app.models.organization_invites import OrganizationInvite
 from app.models.organization_members import OrganizationMember
 from app.models.organizations import Organization
+from app.models.skill_packs import SkillPack
 from app.models.tag_assignments import TagAssignment
 from app.models.tags import Tag
 from app.models.task_custom_fields import (

backend/app/models/marketplace_skills.py

@@ -5,8 +5,7 @@ from __future__ import annotations
 from datetime import datetime
 from uuid import UUID, uuid4
 
-from sqlalchemy import JSON, Column
-from sqlalchemy import UniqueConstraint
+from sqlalchemy import JSON, Column, UniqueConstraint
 from sqlmodel import Field
 
 from app.core.time import utcnow

backend/app/models/skill_packs.py

@@ -5,8 +5,7 @@ from __future__ import annotations
 from datetime import datetime
 from uuid import UUID, uuid4
 
-from sqlalchemy import JSON, Column
-from sqlalchemy import UniqueConstraint
+from sqlalchemy import JSON, Column, UniqueConstraint
 from sqlmodel import Field
 
 from app.core.time import utcnow