Fix unreachable 5xx handling, enum-to-string crash, missing type mapping, and typos

[Copilot]

Code audit surfaced four bugs and several typos across the addon.

Bug fixes

• PlayFabHttp.gd: 5xx server error branch was unreachable — elif response_code >= 400 matched all 4xx and 5xx before the if response_code >= 500 check. Reordered:

  elif response_code >= 500:
      emit_signal("server_error", path)
  elif response_code >= 400:
      # api_error handling

• PlayFab.gd: _add_auth_headers concatenated an enum int with a string (auth_type + "\""), causing a runtime type error. Wrapped in str().

• PlayFabClientConfigLoader.gd: Error message used %f instead of %d for an integer error code.

• LoginWithEmailAddressRequest.gd: Missing _get_type_for_property() override for InfoRequestParameters, so from_dict() deserialization of that sub-object would fail. LoginWithCustomIdRequest already had this mapping.

Typos

calback, iomplemented, verbaitim, Retieve, enxryption, paris — fixed in comments and user-facing strings across six files.

Original prompt

are there any issues you can find in the code?

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