String mutations to fields typed as boolean expects `2xx` (similarly string mutations for `uuid`)

[drlikm]

Describe the bug
The LeadingSingleCodePointEmojisInFields playbook incorrectly applies emoji string mutations to fields typed as boolean in the OpenAPI schema. It sends a string value (e.g. 🥶true) instead of a boolean, then expects a 2xx response — which is wrong.

To Reproduce
Steps to reproduce the behaviour:

1. Have an OpenAPI spec with a POST endpoint containing a field typed as "type": "boolean" (e.g. preauthorizationRequired)
2. Run dochia with the LeadingSingleCodePointEmojisInFields playbook against that endpoint
3. Observe that dochia sends "preauthorizationRequired": "🥶true" (a string with a leading emoji) instead of a boolean
4. Dochia expects a 2xx response, but the API correctly returns 422 due to type mismatch

Expected behaviour
The LeadingSingleCodePointEmojisInFields playbook should only mutate fields with "type": "string". Fields typed as boolean, integer, number, etc. should either be skipped or sent with their correct type. When a boolean field is sent as a string, the expected result should be 4xx, not 2xx.

Environment:

Key             | Value
--------------- | --------------------
OS Name         | Mac OS X
OS Version      | 26.2
OS Arch         | aarch64
Binary Type     | native
Dochia Version  | 1.3.0
Dochia Build    | 2026-0

Relevant OpenAPI section:

preauthorizationRequired:
  type: boolean
  description: whether the preauthorization is required; available only if shoptet pay module is enabled
  examples:
    - true

Additional context
Dochia sent:

"preauthorizationRequired": "🥶true"
instead of:

"preauthorizationRequired": true

Also similarly, with uuid format --> dochia generates "guid": "👩🏾1b02cb8e-d7b5-11e0-9a5c-feab5ed617ed", even if "format": "uuid" is specified (and pattern) and expects 2xx, but 422 is correctly returned via API.

"typeGuid":
        "type": "string"
        "format": "uuid"
        "maxLength": 36
        "pattern": "^[0-9a-f]{8}-([0-9a-f]{4}-){3}[0-9a-f]{12}$"
        "examples": ["1b02cb8e-d7b5-11e0-9a5c-feab5ed617ed"]

OpenAPI file: https://api.docs.shoptet.com/_bundle/Shoptet%20API/openapi.yaml