feat: schema mixins moved to project level

Resolves circular dependency issues.

src/iam/schemas.py

@@ -3,7 +3,6 @@ Pydantic models for the IAM module
 
 Models follow the nomenclature of:
 - Sub-models: "<Resource><Opt:>Schema"
-- Mixins: "<Attribute>Mixin"
 - Models: "<Module><Method><Resource><Opt:Resource><Direction>" ie "IAMGetGroupPermissionsResponse"
 """
 
@@ -11,10 +10,14 @@ from typing import Optional, Annotated
 
 from pydantic import EmailStr, ConfigDict, Field
 
-from src.service.schemas import ServiceIDMixin
-from src.organisation.schemas import OrgIDMixin
-from src.schemas import CustomBaseModel
-from src.user.schemas import UserIDMixin
+from src.schemas import (
+	CustomBaseModel,
+	ServiceIDMixin,
+	OrgIDMixin,
+	UserIDMixin,
+	PermIDMixin,
+	GroupIDMixin,
+)
 
 
 class UserSchema(CustomBaseModel):
@@ -39,14 +42,6 @@ class GroupSchema(CustomBaseModel):
 	name: str
 
 
-class GroupIDMixin(CustomBaseModel):
-	group_id: int = Field(gt=0)
-
-
-class PermIDMixin(CustomBaseModel):
-	permission_id: int = Field(gt=0)
-
-
 class IAMGetGroupPermissionsResponse(CustomBaseModel):
 	permissions: list[PermissionSchema]