Deploy placement specification doesn't match schema

[k9withabone]

What is the problem you're trying to solve
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In the Compose deploy specification, the placement attribute does not match the JSON schema. Docker compose (v2.24.6) seems to conform to the schema and not the specification.

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The specification, schema, and reference implementation (docker compose) should agree on what is acceptable for the deploy placement attribute. I don't have a particular interest in what they agree on, just that they agree.

Additional context
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None.

[k9withabone]

Looking at the deploy specification more closely, it seems that it could use a review in general to make sure the schema and specification match. For example, the resources attribute in the specification is lacking a description of the generic_resources listed in the schema.