fix: allow null latest_released_version for unreleased custom connectors

[okihus]

Summary

CustomConnector.latest_released_version is declared as non-nullable StrictInt in the OpenAPI spec and generated pydantic model, but the Workato API legitimately returns null for this field on custom connectors that have no released versions yet (draft-only).

Because pydantic validates the full list response, any single unreleased connector in a workspace breaks every CLI command that enumerates custom connectors:

• workato connectors list --custom
• workato recipes validate — RecipeValidator.validate_recipe calls list_custom_connectors() at recipes/validator.py:605 to build its adapter whitelist before inspecting the recipe.

Reproduction

1. Create a custom connector in the workspace; save a version; never click "Release".
2. Run either command above. Output:

❌ ValidationError
   1 validation error for CustomConnector
latest_released_version
  Input should be a valid integer [type=int_type, input_value=None, input_type=NoneType]

Fix

• Mark latest_released_version as nullable: true in workato-api-spec.yaml.
• Regenerate the client via make generate-client.

The regenerated model becomes:

latest_released_version: Optional[StrictInt] = Field(
    description="Null when the connector has no released versions yet."
)

Test plan

• uv run pytest tests/unit/ — all passing
• uv run ruff check src/ tests/ — clean
• uv run ruff format --check src/ tests/ — clean
• Reproduced on affected workspace; after patch, both connectors list --custom and recipes validate succeed.

[Copilot]

Pull request overview

Updates the Workato Platform CLI’s OpenAPI spec and regenerated client to correctly handle CustomConnector.latest_released_version being null for draft-only (unreleased) custom connectors, preventing pydantic validation failures when listing/validating recipes.

Changes:

• Mark CustomConnector.latest_released_version as nullable: true in the OpenAPI spec and add a clarifying description.
• Regenerate the pydantic model so latest_released_version accepts None and serializes it correctly when explicitly set.
• Update generated model documentation to reflect the new field description.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
workato-api-spec.yaml	Makes latest_released_version nullable and documents the null semantics for unreleased connectors.
src/workato_platform_cli/client/workato_api/models/custom_connector.py	Regenerates the model to accept Optional[StrictInt] and preserve explicit null in to_dict().
src/workato_platform_cli/client/workato_api/docs/CustomConnector.md	Updates generated docs with the new field description.

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[Copilot]

Optional is imported twice (from typing import ... Optional and from typing import Optional, Set). This is redundant and can be consolidated into a single typing import to keep generated code clean and avoid potential lint churn if rules change.

Suggested change

	from typing import Optional, Set
	from typing import Set

[okihus]

The duplicate Optional import is pre-existing on main (a quirk of the python-asyncio generator template), not introduced by this PR — verified with git show main:src/workato_platform_cli/client/workato_api/models/custom_connector.py. Editing it here would diverge from make generate-client output, so the next regen would undo the fix.

Happy to file a separate issue for the generator config cleanup if useful — feels out of scope for this one-field-nullability fix.