Sederhanakan ambang SP: hapus kolom max_points

- max_points tidak pernah dipakai logika penerbitan SP (trigger hanya baca
  min_points: level dgn ambang tertinggi <= total poin siswa)
- Migrasi drop kolom; model, MasterDataController, ResetController (seeder)
  dibersihkan; form Ambang SP & form tambah cukup satu angka (Min Poin)
- Dashboard Ambang SP: batas atas level dihitung dari min_points level
  berikutnya (level terakhir = tak terbatas), urutan dijamin orderBy min_points
- Test: 29 passed / 99 assertion

database/migrations/2026_08_03_141500_drop_max_points_from_sp_thresholds_table.php

@@ -0,0 +1,26 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * max_points tidak pernah dipakai dalam logika penerbitan SP
+     * (trigger hanya membaca min_points). Hapus agar desain simpel.
+     */
+    public function up(): void
+    {
+        Schema::table('sp_thresholds', function (Blueprint $table) {
+            $table->dropColumn('max_points');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('sp_thresholds', function (Blueprint $table) {
+            $table->integer('max_points')->nullable()->after('min_points');
+        });
+    }
+};