feat: refactor stage 2

apps/shared/db.ts

@@ -72,10 +72,48 @@ export async function migrate(sql: any) {
   await sql`ALTER TABLE monitors ADD COLUMN IF NOT EXISTS max_retries INTEGER NOT NULL DEFAULT 0`;
   await sql`ALTER TABLE monitors ADD COLUMN IF NOT EXISTS retry_interval_s INTEGER NOT NULL DEFAULT 30`;
   await sql`ALTER TABLE monitors ADD COLUMN IF NOT EXISTS resend_interval INTEGER NOT NULL DEFAULT 0`;
-  await sql`ALTER TABLE monitors ADD COLUMN IF NOT EXISTS consecutive_down INTEGER NOT NULL DEFAULT 0`;
-  await sql`ALTER TABLE monitors ADD COLUMN IF NOT EXISTS last_state TEXT`;
+  await sql`ALTER TABLE monitors ADD COLUMN IF NOT EXISTS cert_alert_days INTEGER NOT NULL DEFAULT 14`;
   await sql`ALTER TABLE pings ADD COLUMN IF NOT EXISTS important BOOLEAN NOT NULL DEFAULT false`;
 
+  // Per-region transition state. region='' for unspecified/single-region monitors.
+  await sql`
+    CREATE TABLE IF NOT EXISTS monitor_region_state (
+      monitor_id        TEXT NOT NULL REFERENCES monitors(id) ON DELETE CASCADE,
+      region            TEXT NOT NULL,
+      last_state        TEXT,
+      consecutive_down  INTEGER NOT NULL DEFAULT 0,
+      cert_alert_sent   BOOLEAN NOT NULL DEFAULT false,
+      updated_at        TIMESTAMPTZ DEFAULT now(),
+      PRIMARY KEY (monitor_id, region)
+    )
+  `;
+  // Drop the now-stale per-monitor state columns from the previous slice.
+  await sql`ALTER TABLE monitors DROP COLUMN IF EXISTS last_state`;
+  await sql`ALTER TABLE monitors DROP COLUMN IF EXISTS consecutive_down`;
+
+  // Notifications: modular providers, webhook only for now.
+  await sql`
+    CREATE TABLE IF NOT EXISTS notification_channels (
+      id          UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+      account_id  UUID NOT NULL REFERENCES accounts(id) ON DELETE CASCADE,
+      name        TEXT NOT NULL,
+      kind        TEXT NOT NULL,
+      config      JSONB NOT NULL,
+      enabled     BOOLEAN NOT NULL DEFAULT true,
+      created_at  TIMESTAMPTZ DEFAULT now()
+    )
+  `;
+  await sql`CREATE INDEX IF NOT EXISTS idx_notification_channels_account ON notification_channels(account_id)`;
+
+  await sql`
+    CREATE TABLE IF NOT EXISTS monitor_notifications (
+      monitor_id  TEXT NOT NULL REFERENCES monitors(id) ON DELETE CASCADE,
+      channel_id  UUID NOT NULL REFERENCES notification_channels(id) ON DELETE CASCADE,
+      PRIMARY KEY (monitor_id, channel_id)
+    )
+  `;
+  await sql`CREATE INDEX IF NOT EXISTS idx_monitor_notifications_channel ON monitor_notifications(channel_id)`;
+
   await sql`CREATE INDEX IF NOT EXISTS idx_pings_monitor ON pings(monitor_id, checked_at DESC)`;
   await sql`CREATE INDEX IF NOT EXISTS idx_pings_checked_at ON pings(checked_at)`;