feat: add post endpoints

[andrewelamb]

This pr add the POST endpoints from the current API:

• /model/submit split into /submitManifestJson and /submitManifestCsv
• /model/validate split into /validateManifestJson and /validateManifestCsv

Fixes fds-901
Fixes fds-902

[andrewelamb]

@tschaffter I'm having several issues, but the first one to address is described in this issue

When using this branch, the /submitManifestCsv endpoint doesn't have the option to upload a file in the swagger ui.

The current requestBody looks like:

  requestBody:
    description: .csv file
    content:
      application/csv:
        schema:
          type: string
          format: binary

I've also tried application/octet-stream instead of application/csv as per the linked issue, but that didn't work either.

[tschaffter]

@andrewelamb This is the first time I encounter this use case. I checked first that Swagger UI had a widget to upload files, which it does according to the screenshot in this PR.

I tried your request body in Swagger Editor by modifying the default pet store API:

openapi: 3.0.3
info:
  title: Swagger Petstore - OpenAPI 3.0
  version: 1.0.11
externalDocs:
  description: Find out more about Swagger
  url: http://swagger.io
servers:
  - url: https://petstore3.swagger.io/api/v3
paths:
  /pet:
    post:
      tags:
        - pet
      summary: Add a new pet to the store
      description: Add a new pet to the store
      operationId: addPet
      requestBody:
        description: .csv file
        content:
          application/csv:
            schema:
              type: string
              format: binary
        required: true
      responses:
        '200':
          description: Successful operation

endpoint doesn't have the option to upload a file in the swagger ui.

Did you click on the "Try it out" button? The upload button does not show up in the Swagger Editor until you do.

Before clicking on the button:

After clicking:

Otherwise, there may be an issue with the Python package in the project that generate the Swagger UI.

[andrewelamb]

@tschaffter You are correct, clicking the "try it out button" did make that appear. Thanks for looking at this!