[SPARK-55848][SQL][4.1] Restore deleted comments in satisfies0()

[naveenp2708]

Description:

### What changes were proposed in this pull request?

Follow-up to #54751. Restores 3 comments in `satisfies0()` that were accidentally deleted during the restructuring. Comments only, no logic changes.

### Why are the changes needed?

Per @peter-toth's review in #54851, the original comments should be preserved.

### Does this PR introduce any user-facing change?

No. Comments only.

### How was this patch tested?

Compilation verified. No logic changes.

### Was this patch authored or co-authored using generative AI tooling?

No.

[naveenp2708]

@peter-toth Follow-up to restore deleted comments on branch-4.1 as requested