chore(deps): bump platform MinimumVersionTag to v4.5.1

[loft-bot]

Bumps MinimumVersionTag to the new Platform release v4.5.1.

---

Note

Update platform minimum compatible version from v4.5.0 to v4.5.1.

^{Written by Cursor Bugbot for commit 2009ec4. This will update automatically on new commits. Configure here.}

[github-actions]

Optional enhancement: Consider adding a compile-time validation test to ensure MinimumVersionTag is always a valid semver string. This would catch any future manual edits that might introduce invalid versions.

Example test:

func TestMinimumVersionTagIsValid(t *testing.T) {
    _, err := semver.Parse(strings.TrimPrefix(MinimumVersionTag, "v"))
    if err != nil {
        t.Fatalf("MinimumVersionTag %q is not a valid semver: %v", MinimumVersionTag, err)
    }
}

This is not blocking for this PR, just a suggestion for future robustness.