[Feature]: CLI version integers not validated for range

[Splatcrafter]

AI REVIEWED

Module: cli
Files: MigrateCommand, ValidateCommand --from/--to options
Severity: Low

Problem / Motivation

Version integers accept negative values or extremely large values without validation. Negative versions have no semantic meaning and could cause unexpected behavior.

Proposed Solution

Add picocli validation or manual range check:

if (this.fromVersion < 0 || this.toVersion < 0) {
    System.err.println("Error: Version numbers must be non-negative");
    return 1;
}