fix: Add support for parameterless ops

[vblagoje]

Why:

Enhances the _convert_operation_to_openai_schema function to correctly handle OpenAPI specifications that lack parameters, ensuring valid schema returns even when no parameters are present.

• fixes Empty parameter operations not supported in OpenAPI to schema conversion #10

What:

• Modified _convert_operation_to_openai_schema to handle parameterless specifications by implementing a fall-back schema creation mechanism.
• Added a new YAML file parameterless.yml to test parameterless OpenAPI schema scenarios.
• Updated existing tests and added new test cases to validate the handling of parameterless API specifications.

How can it be used:

• Internal change not visible to users

This ensures the function outputs a valid schema when processing specs without parameters.

How did you test it:

Test cases were added to verify proper conversion of parameterless OpenAPI specifications. The new tests validate that functions are correctly extracted and described, even in the absence of parameters.

Notes for the reviewer:

Ensure to check that the revamped _convert_operation_to_openai_schema consistently handles edge cases related to missing parameters, and that other functionalities remain intact. Pay attention to the additional test coverage introduced via parameterless.yml.

[coveralls]

Pull Request Test Coverage Report for Build 12712467778

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 5 unchanged lines in 1 file lost coverage.
• Overall coverage remained the same at 81.293%

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Files with Coverage Reduction	New Missed Lines	%
core/schema_conversion.py	5	91.15%

Totals
Change from base Build 12701310633:	0.0%
Covered Lines:	352
Relevant Lines:	433

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💛 - Coveralls