feat: Mark get api metadata as get method

[FallenDeity]

Change description

Previously api metadata openapi schema defined it as a list which is misleading, redefined the schema to return an object since thats whats actually returned by the api (list -> get)

      responses:
        '200':
          content:
            application/json:
              schema:
-              type: array
+              type: object

AI coding assistance disclosure

None

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• I have written a description of the contribution and explained its motivation.
• I have written tests for my code changes (if applicable).
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