✅(json) add a test for declared schema

This checks all the defined schema are properly defined.

src/backend/core/tests/jsonschema/__init__.py

@@ -0,0 +1 @@
+"""Test module for the JSON schema validation."""

src/backend/core/tests/jsonschema/test_schema.py

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+"""Test module for the JSON schema validation."""
+
+import json
+import os
+
+import pytest
+
+
+def test_all_json_schemas_load_correctly(settings):
+    """Test that all JSON schema files in the jsonschema directory load correctly."""
+    # Get the base directory for jsonschema files
+    schema_dir = os.path.join(settings.BASE_DIR, "core", "jsonschema")
+
+    # List to store any errors encountered
+    errors = []
+    loaded_schemas = 0
+
+    # Walk through the jsonschema directory and its subdirectories
+    for root, _, files in os.walk(schema_dir):
+        for file in files:
+            if file.endswith(".json"):
+                schema_path = os.path.join(root, file)
+                rel_path = os.path.relpath(schema_path, schema_dir)
+
+                try:
+                    # Try to load the schema
+                    with open(schema_path, "r", encoding="utf-8") as schema_file:
+                        schema = json.load(schema_file)
+
+                    # Verify it's a dictionary (basic schema validation)
+                    assert isinstance(schema, dict), (
+                        f"Schema in {rel_path} is not a dictionary"
+                    )
+
+                    # Check for common schema properties
+                    if "$schema" not in schema:
+                        errors.append(
+                            f"Warning: {rel_path} does not contain a $schema property"
+                        )
+
+                    loaded_schemas += 1
+
+                except json.JSONDecodeError as e:
+                    errors.append(f"Failed to decode {rel_path}: {e}")
+                except Exception as e:  # noqa: BLE001 pylint: disable=broad-except
+                    errors.append(f"Error loading {rel_path}: {e}")
+
+    # Ensure we found and loaded at least one schema
+    assert loaded_schemas > 0, "No JSON schema files were found"
+
+    # If any errors were encountered, fail the test
+    if errors:
+        pytest.fail("\n".join(errors))