fix: replace tuple[str, int] with list[int | str] in ports schema

[oijkn]

tuple[str, int] generates an array schema without an items field in
JSON Schema, which is invalid and causes a 400 error when the tool is
registered with AI APIs (e.g. OpenAI, Anthropic):

 Invalid schema for function 'docker-create_container':
 In context=('properties', 'ports', 'anyOf', '0', 'additionalProperties',
 'anyOf', '2'), array schema missing items.

Replace with list[int | str] which correctly generates:
{"type": "array", "items": {"anyOf": [{"type": "integer"}, {"type": "string"}]}}

The Docker SDK accepts both int and "host_ip:port" string formats for
port bindings, so list[int | str] is semantically equivalent.

[Copilot]

Pull request overview

This PR fixes invalid JSON Schema generation for the CreateContainerInput.ports field so the create_container / run_container tools can be registered with AI function/tool APIs that reject array schemas missing an items definition.

Changes:

• Replace tuple[str, int] with list[int | str] in the ports union type to ensure valid JSON Schema (items present) for arrays.

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