Create Unique Pricing Config
------------------------------

Create a new unique-date pricing config for a cost rate. The cost rate \
must have ``dynamic_pricing`` set to ``2`` (exact date and time). The \
request must include the cost rate UUID, a config name, and a start \
time. On success, the response returns the created config.

**Request**

- Method: ``POST``
- Path: ``/api/dynamic_pricing/unique_pricing_config``

**Body parameters**

Mandatory:

.. list-table::
   :widths: 25 15 60
   :header-rows: 1

   * - Name
     - Type
     - Description
   * - cost_rate_uuid
     - string
     - UUID of the cost rate to create the config for.
   * - name
     - string
     - Name of the unique-date pricing config.
   * - start_time
     - string
     - Start date and time in ``Y-m-d H:i:s`` format, in the mandant's \
       timezone (e.g., ``2026-01-01 00:00:00``).

**Example request**

.. code-block:: bash

    curl --location --request POST 'https://example.beenergised.cloud/api/dynamic_pricing/unique_pricing_config' \
    --header 'x-api-token: <your_token>' \
    --header 'Content-Type: application/json' \
    --data '{
      "cost_rate_uuid": "<COST_RATE_UUID>",
      "name": "New Year Special",
      "start_time": "2026-01-01 00:00:00"
    }'

**Response (200)**

.. code-block:: json

    {
      "status": "success",
      "data": {
        "uuid": "<CONFIG_UUID>",
        "name": "New Year Special",
        "start_time": "2026-01-01 00:00:00"
      }
    }

**Error responses**

- ``404``: Cost rate or unique pricing config not found.

.. code-block:: json

    {
      "status": "error",
      "message": "Cost rate not found"
    }

- ``400``: Validation error \
  (e.g., the cost rate does not use unique-date pricing).

.. code-block:: json

    {
      "status": "error",
      "message": "<validation message>"
    }

- ``500``: Generic server error.

.. code-block:: json

    {
      "status": "error",
      "message": "Internal Server Error"
    }