feat: org dependencies

Org endpoints use query/body model dependencies to perform initial db lookups.

Issue #6

Org ID path params have been replaced with either query params (get endpoints) or body values.

Resolves #10

Endpoints in other modules that rely on an org model lookup have also been updated.

src/organisation/exceptions.py

@@ -4,4 +4,16 @@ Module specific exceptions for organisation module
 Exceptions:
  - List: Description
  - Exceptions: Description
-"""
+"""
+from typing import Optional
+
+from fastapi import HTTPException, status
+
+
+class OrgNotFoundException(HTTPException):
+	def __init__(self, org_id: Optional[int] = None) -> None:
+		detail = "Organisation not found" if org_id is None else f"User with ID '{org_id}' was not found."
+		super().__init__(
+			status_code=status.HTTP_404_NOT_FOUND,
+			detail=detail,
+		)