Invalid default value in `/deep-research` `formats` property

[kamilrzany]

Problem

OpenAPI Generator fails with validation error when generating code from the schema at firecrawl-docs/api-reference/v1-openapi.json:

-attribute paths.'/deep-research'(post).requestBody.content.'application/json'.schema.default is not of type `string`

Root Cause

In /deep-research endpoint, the formats property has default incorrectly placed in items instead of at property level:
Current (incorrect):

"formats": {
    "type": "array",
    "items": {
        "type": "string",
        "enum": ["markdown", "json"],
        "default": ["markdown"]  // Array default in string items schema
    }
}

Should be:

"formats": {
    "type": "array",
    "items": {
        "type": "string",
        "enum": ["markdown", "json"]
    },
    "default": ["markdown"]  // Array default at array property level
}

Fix

Move the default: ["markdown"] from items to the formats property level.
Location: paths["/deep-research"].post.requestBody.content["application/json"].schema.properties.formats
This fixes the type mismatch where a string schema had an array default value, allowing OpenAPI Generator to process the schema successfully.