Incorrect recognition of Literal value

[steadyfirmness]

Describe the bug
Often the name is used as the value of Literal

To Reproduce

Example schema:

openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/openai-aa9b01fc0c17eb0cbc200533fc20d6a49c5e764ceaf8049e08b294532be6e9ff.yml

Used commandline:

$  datamodel-codegen \
 --input openai-aa9b01fc0c17eb0cbc200533fc20d6a49c5e764ceaf8049e08b294532be6e9ff.yml \
 --output models.py \
 --output-model-type pydantic_v2.BaseModel \
 --target-python-version 3.12 \
 --enum-field-as-literal all \
 --field-constraints \
 --use-standard-collections \
 --use-union-operator \
 --field-include-all-keys \
 --use-default-kwarg \
 --use-exact-imports \
 --use-schema-description \
 --treat-dot-as-module \
 --use-title-as-name \

Expected behavior

(part of yml)
OtherChunkingStrategyResponseParam:
      type: object
      title: Other Chunking Strategy
      description: >-
        This is returned when the chunking strategy is unknown. Typically, this is because the file was
        indexed before the `chunking_strategy` concept was introduced in the API.
      additionalProperties: false
      properties:
        type:
          type: string
          description: Always `other`.
          enum:
            - other
      required:
        - type

(what i expected)
class OtherChunkingStrategy(BaseModel):
    """
    This is returned when the chunking strategy is unknown. Typically, this is because the file was indexed before the `chunking_strategy` concept was introduced in the API.
    """

    model_config = ConfigDict(
        extra='forbid',
    )
    type: Literal['other'] = Field(
        ..., description='Always `other`.'
    )

(What actually happened)
class OtherChunkingStrategy(BaseModel):
    """
    This is returned when the chunking strategy is unknown. Typically, this is because the file was indexed before the `chunking_strategy` concept was introduced in the API.
    """

    model_config = ConfigDict(
        extra='forbid',
    )
    type: Literal['OtherChunkingStrategyResponseParam'] = Field(
        ..., description='Always `other`.'
    )

Noted that the 'Literal['OtherChunkingStrategyResponseParam']' instead of Literal['other']

Version:

• OS: macis
• Python version: 3.12
• datamodel-code-generator version: 0.26.0

Additional context
In this case, the frequency of occurrence of only one enumeration value is high。
e.g

class CodeInterpreterImageOutput(BaseModel):
    index: int = Field(..., description='The index of the output in the outputs array.')
    type: Literal['RunStepDeltaStepDetailsToolCallsCodeOutputImageObject'] = Field(
        ..., description='Always `image`.'
    )
    image: Image1 | None = None


class CodeInterpreterLogOutput(BaseModel):
    """
    Text output from the Code Interpreter tool call as part of a run step.
    """

    index: int = Field(..., description='The index of the output in the outputs array.')
    type: Literal['RunStepDeltaStepDetailsToolCallsCodeOutputLogsObject'] = Field(
        ..., description='Always `logs`.'
    )
    logs: str | None = Field(
        default=None, description='The text output from the Code Interpreter tool call.'
    )