Implement canals and messages table

internal/infrastructure/database/migrations/000001_create_users_table.up.sql

@@ -8,8 +8,8 @@ CREATE TABLE IF NOT EXISTS users (
     date_of_birth DATE,
     address VARCHAR(255),
     phone_number VARCHAR(20),
-    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
-    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
     last_login TIMESTAMP NULL,
     is_active BOOLEAN DEFAULT TRUE,
     is_admin BOOLEAN DEFAULT FALSE,

internal/infrastructure/database/migrations/000003_create_canals_table.down.sql

@@ -0,0 +1 @@
+DROP TABLE IF EXISTS canals;

internal/infrastructure/database/migrations/000003_create_canals_table.up.sql

@@ -0,0 +1,7 @@
+CREATE TABLE canals (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    name VARCHAR(255) NOT NULL,
+    type ENUM('private', 'public') NOT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

internal/infrastructure/database/migrations/000004_create_messages_table.down.sql

@@ -0,0 +1 @@
+DROP TABLE IF EXISTS messages;

internal/infrastructure/database/migrations/000004_create_messages_table.up.sql

@@ -0,0 +1,10 @@
+CREATE TABLE messages (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    canal_id INT NOT NULL,
+    user_id INT NOT NULL,
+    content TEXT NOT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    FOREIGN KEY (canal_id) REFERENCES canals(id) ON DELETE CASCADE,
+    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+) ENGINE=InnoDB CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;