Hardware Details Summary: Prefer hash commits on selected commits filter.

[alanpeixinho]

A significant portion of the latency in the Hardware Details Summary endpoint comes from resolving the 'head' string into a commit hash for each tree.

To optimize this, I suggest the following:

• Frontend: Whenever possible, please pass the direct commit hash instead of the 'head' alias.
• Backend: If the request contains only direct hashes, we should skip the 'head' resolution logic entirely to save processing time.

This change should improve response times for the hardware summarization.