Update data_stream.yml with top level type: group

[Omarimcblack]

when running version v1.12.2 with the flag -oss

python3 scripts/generator.py  --include <MY-SCHEMAS> --template-settings <MY-TEMPLATE> --mapping-settings <MY-MAPPINGS> --oss

the following error occured

Traceback (most recent call last):
  File "ecs/scripts/generator.py", line 112, in <module>
    main()
    ~~~~^^
  File "ecs/scripts/generator.py", line 52, in main
    oss.fallback(fields)
    ~~~~~~~~~~~~^^^^^^^^
  File "ecs/scripts/schema/oss.py", line 26, in fallback
    visitor.visit_fields(fields, field_func=perform_fallback)
    ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "ecs/scripts/schema/visitor.py", line 19, in visit_fields
    field_func(details)
    ~~~~~~~~~~^^^^^^^^^
  File "ecs/scripts/schema/oss.py", line 32, in perform_fallback
    fallback_type = TYPE_FALLBACKS.get(field['field_details']['type'])
                                       ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
KeyError: 'type'

this error was fixed when adding the type: group top level field to schemas/data_stream.yml, and the expected functionality achieved, correct fallback of:

TYPE_FALLBACKS = {
    'constant_keyword': 'keyword',
    'wildcard': 'keyword',
    'version': 'keyword',
    'match_only_text': 'text',
    'flattened': 'object'
}

---

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• Have you followed the contributor guidelines?
• For proposing substantial changes or additions to the schema, have you reviewed the RFC process?
• If submitting code/script changes, have you verified all tests pass locally using make test?
• If submitting schema/fields updates, have you generated new artifacts by running make and committed those changes?
• Is your pull request against main? Unless there is a good reason otherwise, we prefer pull requests against main and will backport as needed.
• Have you added an entry to the CHANGELOG.next.md?

[cla-checker-service]

💚 CLA has been signed

[mjwolf]

Hi @Omarimcblack, if you're willing to, could you please sign the contributor agreement from the @cla-checker-service comment above?

[Omarimcblack]

Hi @Omarimcblack, if you're willing to, could you please sign the contributor agreement from the @cla-checker-service comment above?

Hi @mjwolf i have signed the agreement, are you able to re run checks?

[mjwolf]

@Omarimcblack thanks for the contribution!