feat: enums, schema and models for hado core

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BCrwHHnGCB5XH968Nxokqw

core/app/Enums/EventState.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace App\Enums;
+
+enum EventState: string
+{
+    case Scheduled = 'scheduled';
+    case Preparing = 'preparing';
+    case Today = 'today';
+    case Overdue = 'overdue';
+    case Done = 'done';
+    case Expired = 'expired';
+    case Withdrawn = 'withdrawn';
+
+    public function isTerminal(): bool
+    {
+        return in_array($this, [self::Done, self::Expired, self::Withdrawn], true);
+    }
+
+    /** Состояния, в которых ядро напоминает. */
+    public function isActive(): bool
+    {
+        return in_array($this, [self::Preparing, self::Today, self::Overdue], true);
+    }
+
+    public function countsInBadge(): bool
+    {
+        return in_array($this, [self::Today, self::Overdue], true);
+    }
+
+    /** @return list<string> */
+    public static function nonTerminalValues(): array
+    {
+        return array_values(array_map(
+            fn (self $s) => $s->value,
+            array_filter(self::cases(), fn (self $s) => ! $s->isTerminal()),
+        ));
+    }
+}