feat(spec2sdk): render simple types as Pydantic RootModel

[catcombo]

Reviewer

• for your information
• process and function, acceptance criteria
• implementation (code design, correctness, formatting)
  • unit tests are implemented
  • E2E tests are implemented, if reasonable
• testing
  • checklist of test cases for manual testing is created
  • all test cases are passed successfully
  • invariants are checked (what should stay the same or not be affected by the changes)

Description

The example is copied from Softfair customer spec:

paths:
  /dokument/get/data:
    post:
      operationId: GetDokumente
      requestBody:
        description: Liste der auszulesenden Dokumente
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/DokumentIDs'
      responses:
        '200':
          description: Successful response

components:
  schemas:
    DokumentIDs:
      type: array
      items:
        type: integer
        format: int32

spec2sdk generates a model DokumentIDs: TypeAlias = list[int] that will be used as a type for parameter in the get_dokumente method:

But the type of the field doesn't meet HTTPClient requirements for the body field. It must be a BaseModel to be serializable. This PR makes simple types serializable. New model will be DokumentIDs = RootModel[list[int]] and can be serialized.

[mm-matthias]

You really know a lot of pydantic magics now.

[catcombo]

You really know a lot of pydantic magics now.

This is just a scratch on the surface :)