Kick off (#1)

* Kick off
* Update LICENSE copyright

migrations/0001_initial.sql

@@ -0,0 +1,30 @@
+CREATE TABLE check_results (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  monitor_name TEXT NOT NULL,
+  checked_at INTEGER NOT NULL,
+  status TEXT NOT NULL,
+  response_time_ms INTEGER,
+  error_message TEXT,
+  attempts INTEGER NOT NULL
+);
+
+CREATE INDEX idx_results_monitor_time ON check_results(monitor_name, checked_at DESC);
+
+CREATE TABLE monitor_state (
+  monitor_name TEXT PRIMARY KEY,
+  current_status TEXT NOT NULL,
+  consecutive_failures INTEGER DEFAULT 0,
+  last_status_change INTEGER,
+  last_checked INTEGER
+);
+
+CREATE TABLE alerts (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  monitor_name TEXT NOT NULL,
+  alert_type TEXT NOT NULL,
+  sent_at INTEGER NOT NULL,
+  alert_name TEXT NOT NULL,
+  success INTEGER NOT NULL
+);
+
+CREATE INDEX idx_alerts_monitor ON alerts(monitor_name, sent_at DESC);