Add alerting database and default alert script

scripts/migrate-alerting-db.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+DB_FILE="/opt/appfactory/data/appfactory/appfactory.db"
+
+python3 - "$DB_FILE" <<'PY'
+import sqlite3
+import sys
+
+con = sqlite3.connect(sys.argv[1])
+
+con.execute("""
+CREATE TABLE IF NOT EXISTS alert_rules (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    name TEXT NOT NULL,
+    description TEXT,
+    event_type TEXT NOT NULL,
+    service_id TEXT,
+    script_name TEXT NOT NULL,
+    is_enabled INTEGER NOT NULL DEFAULT 1,
+    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
+)
+""")
+
+con.execute("""
+CREATE TABLE IF NOT EXISTS alert_events (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    rule_id INTEGER,
+    event_type TEXT NOT NULL,
+    service_id TEXT,
+    incident_id INTEGER,
+    status TEXT NOT NULL DEFAULT 'queued',
+    job_id INTEGER,
+    error_text TEXT,
+    payload_json TEXT,
+    created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    processed_at TEXT
+)
+""")
+
+con.execute("""
+CREATE INDEX IF NOT EXISTS idx_alert_rules_event
+ON alert_rules(event_type, is_enabled)
+""")
+
+con.execute("""
+CREATE INDEX IF NOT EXISTS idx_alert_events_status
+ON alert_events(status, created_at)
+""")
+
+con.commit()
+con.close()
+
+print("Alerting migration completed.")
+PY