docs: add search_process_definition_variable_names example coverage

[emilyoram]

Description

Adds example coverage for the searchProcessDefinitionVariableNames operation (POST /process-definitions/{processDefinitionKey}/variable-names/search, tag Process definition, added in 8.10), closing the coverage gap reported in #199.

• Add a SearchProcessDefinitionVariableNames region example to examples/extended_operations.py (alongside SearchProcessDefinitions), calling client.search_process_definition_variable_names(process_definition_key=...) and printing each variable.name.
• Add the search_process_definition_variable_names entry to examples/operation-map.json.

Following the same convention as the merged change_cluster_mode example PR, this touches only the two hand-written example files. Generated code (generated/, stubs/) and the bundled spec are regenerated fresh by CI and are intentionally not committed here.

Verification

Validated locally by regenerating the SDK from the latest upstream spec (not committed):

• ty check examples/ — example type-checks against the generated search_process_definition_variable_names(process_definition_key, *, data) method
• ruff check on the example — clean
• check_example_coverage.py — 100% (198/198), integrity check passes

Closes #199

[Copilot]

Pull request overview

Adds missing example coverage for the searchProcessDefinitionVariableNames API operation by introducing a new region-tagged example and wiring it into the operation-map.json so coverage tooling and docs can discover it.

Changes:

• Added a new SearchProcessDefinitionVariableNames region example in examples/extended_operations.py.
• Added an operation-map.json entry mapping search_process_definition_variable_names to that region.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
examples/operation-map.json	Registers the new operationId→example mapping for search_process_definition_variable_names.
examples/extended_operations.py	Adds the SearchProcessDefinitionVariableNames region and example function that calls client.search_process_definition_variable_names(...).

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.