[Recommendation feature] Distinguish between user requirements that must be satisfied and those that could be similar

[yunkon-kim]

Note

First of all, a user should confirm the response of the recommendation API.

It is required to check if the recommendation feature supports it well when an item must satisfy the user's requirements.

For example,

1. A user specifies an OS version such as Ubuntu 24.04.4 due to a system library issue.
2. No VM OS image satisfies this in the target cloud.
3. It returns that no VM OS image satisfies this.

Currently, the threshold/activation function is applied to the calculated similarity, which can be seen as reflecting the above. Therefore, I first plan to improve it by adjusting the sensitivity. Next, I will consider comparing strict patterns.