feat: schema mixins moved to project level

Resolves circular dependency issues.

src/schemas.py

@@ -6,7 +6,7 @@ Exports:
  - ResourceName
 """
 
-from pydantic import BaseModel
+from pydantic import BaseModel, Field
 from typing import Optional
 
 
@@ -19,3 +19,24 @@ class ResourceName(CustomBaseModel):
 	organisation: str
 	resource: str
 	instance: Optional[str] = None
+
+
+### Mixins ###
+class OrgIDMixin(CustomBaseModel):
+	organisation_id: int = Field(gt=0)
+
+
+class GroupIDMixin(CustomBaseModel):
+	group_id: int = Field(gt=0)
+
+
+class PermIDMixin(CustomBaseModel):
+	permission_id: int = Field(gt=0)
+
+
+class ServiceIDMixin(CustomBaseModel):
+	service_id: int = Field(gt=0)
+
+
+class UserIDMixin(CustomBaseModel):
+	user_id: int = Field(gt=0)