supporting files for validate module not loading references

combined.json

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$defs": {
    "cidr": {
      "$comment": "CIDR, IPv4-only",
      "type": "string",
      "pattern": "^[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}/[0-9]{1,2}"
    }
  },
  "type": "object",
  "properties": {
    "network": {
      "$ref": "#/$defs/cidr"
    }
  }
}

common.json

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "file:///tmp/schemas/common.json",
  "validators": {
    "cidr": {
      "$comment": "CIDR, IPv4-only",
      "type": "string",
      "pattern": "^[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}/[0-9]{1,2}"
    }
  }
}

debug.py

#!/usr/bin/env python

import json
from jsonschema import validate

cidr = "192.0.2.0/24"
not_cidr = "192.0.2.0"

combined_schema = json.load(open("/tmp/schemas/combined.json"))
referring_schema = json.load(open("/tmp/schemas/referring.json"))

for k,v in { "combined": combined_schema, "referring": referring_schema }.items():
  for net in [cidr, not_cidr]:
    try:
      validate({"network": net}, v)
    except:
      print(f"Validation of {net} failed with {k}")

debug.yml

---
- hosts: localhost
  gather_facts: false
  tasks:
    - name: setup test_data
      set_fact:
        test_data:
          - name: cidr
            network: 192.0.2.0/24
          - name: not_cidr
            network: 192.0.2.0

    - name: validate with combined schema
      ansible.utils.validate:
        data: "{{ item | to_json }}"
        criteria: "{{ lookup('file','/tmp/schemas/combined.json') | from_json }}"
        engine: ansible.utils.jsonschema
      loop: "{{ test_data }}"
      loop_control:
        label: "{{ item.name }}"
      ignore_errors: true

    - name: validate with referring schema
      ansible.utils.validate:
        data: "{{ item | to_json }}"
        criteria: "{{ lookup('file','/tmp/schemas/referring.json') | from_json }}"
        engine: ansible.utils.jsonschema
      loop: "{{ test_data }}"
      loop_control:
        label: "{{ item.name }}"
      ignore_errors: true

referring.json

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "file:///tmp/schemas/referring.json",
  "$ref": "file:///tmp/schemas/common.json",
  "type": "object",
  "properties": {
    "network": {
      "$ref": "common.json#validators/cidr"
    }
  }
}