Misbehaving model `save()` when names are too long

Describe the bug
Model save() is not working when the model name and field name is too long and select_related is used.

To Reproduce

Tortoise ORM version: 0.25.1

Creating the test models:

from tortoise.models import Model
from tortoise import fields

class TUser(Model):
    id = fields.UUIDField(primary_key=True)
    name = fields.CharField(max_length=100)

    user_information: fields.ReverseRelation["models.VeryLongNameForTestingPurposesOnlyUserInfo"]
    short_user_info: fields.ReverseRelation["models.ShortUserInfo"]


class VeryLongNameForTestingPurposesOnlyUserInfo(Model):
    id = fields.UUIDField(primary_key=True)
    user: fields.OneToOneNullableRelation[TUser] = fields.OneToOneField(
        model_name="models.TUser",
        to_field="id",
        related_name="user_information"
    )
    not_too_long_user_age = fields.IntField()


class ShortUserInfo(Model):
    id = fields.UUIDField(primary_key=True)
    user: fields.OneToOneNullableRelation[TUser] = fields.OneToOneField(
        model_name="models.TUser",
        to_field="id",
        related_name="short_user_info"
    )
    age = fields.IntField()

Reproducing the issue:

    print("Creating user and user info")
    user = await TUser.create(name="Test User")
    user_info = await VeryLongNameForTestingPurposesOnlyUserInfo.create(
        user_id=user.id,
        not_too_long_user_age=30,
    )
    short_info = await ShortUserInfo.create(
        user_id=user.id,
        age=30,
    )

    print("Working")
    user = await TUser.filter(name="Test User").select_related("short_user_info").first()
    user_info = user.short_user_info
    user_info.age = 31
    await user_info.save()
    
    print("Not Working")
    user = await TUser.filter(name="Test User").select_related("user_information").first()
    user_info = user.user_information
    user_info.not_too_long_user_age = 32
    await user_info.save(
        # update_fields=["not_too_long_user_age"]
    )

This will raise:

IncompleteInstanceError: VeryLongNameForTestingPurposesOnlyUserInfo is a partial model, can only be saved with the relevant update_field provided

(Saving with update_fields works.)

Expected behavior
Saving with select_related should work regardless of the model name length.

Run the supplied reproduction with the long and short related model names, then compare the select_related paths that lead to each save(). Trace how partial models and selected fields are tracked before IncompleteInstanceError is raised. Done means saving the related object succeeds without update_fields regardless of model name length, while the existing update_fields behavior remains valid.