feat(16-automated-tasks): moduł zadań automatycznych — CRUD + watcher/executor

Reguły automatyzacji oparte na zdarzeniach (receipt.created) z warunkami
(integracja/kanał sprzedaży, AND logic) i akcjami (wyślij e-mail z 3 trybami
odbiorcy: klient / firma / klient+firma). Trigger w ReceiptController po
utworzeniu paragonu — błąd automatyzacji nie blokuje sukcesu paragonu.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

database/migrations/20260318_000057_create_automation_tables.sql

@@ -0,0 +1,32 @@
+CREATE TABLE IF NOT EXISTS `automation_rules` (
+    `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
+    `name` VARCHAR(128) NOT NULL,
+    `event_type` VARCHAR(64) NOT NULL,
+    `is_active` TINYINT(1) NOT NULL DEFAULT 1,
+    `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    `updated_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    PRIMARY KEY (`id`),
+    INDEX `auto_rules_event_active_idx` (`event_type`, `is_active`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE IF NOT EXISTS `automation_conditions` (
+    `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
+    `rule_id` INT UNSIGNED NOT NULL,
+    `condition_type` VARCHAR(64) NOT NULL,
+    `condition_value` JSON NOT NULL,
+    `sort_order` SMALLINT UNSIGNED NOT NULL DEFAULT 0,
+    PRIMARY KEY (`id`),
+    INDEX `auto_cond_rule_idx` (`rule_id`),
+    CONSTRAINT `auto_cond_rule_fk` FOREIGN KEY (`rule_id`) REFERENCES `automation_rules` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE IF NOT EXISTS `automation_actions` (
+    `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
+    `rule_id` INT UNSIGNED NOT NULL,
+    `action_type` VARCHAR(64) NOT NULL,
+    `action_config` JSON NOT NULL,
+    `sort_order` SMALLINT UNSIGNED NOT NULL DEFAULT 0,
+    PRIMARY KEY (`id`),
+    INDEX `auto_act_rule_idx` (`rule_id`),
+    CONSTRAINT `auto_act_rule_fk` FOREIGN KEY (`rule_id`) REFERENCES `automation_rules` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;