Small changes

internal/db/migrations/20250806_initial.sql

@@ -0,0 +1,20 @@
+CREATE TABLE urls (
+    shorturl VARCHAR(7) PRIMARY KEY,
+    url VARCHAR(100) NOT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    expires_at TIMESTAMP DEFAULT NULL,
+    active BOOLEAN DEFAULT TRUE
+
+);
+
+CREATE TABLE analytics (
+    id BIGINT AUTO_INCREMENT PRIMARY KEY,
+    shorturl VARCHAR(7) NOT NULL,
+    count INTEGER DEFAULT 0,
+    ip_address VARCHAR(50) DEFAULT NULL,
+    user_agent VARCHAR(1024) DEFAULT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    FOREIGN KEY (shorturl) REFERENCES urls(shorturl),
+
+);