Extract groombook/api from monorepo with CI workflow

- Add source code from apps/api
- Add packages/db and packages/types workspace dependencies
- Add GitHub Actions CI workflow (lint, typecheck, test, docker)
- Generate pnpm-lock.yaml
- Add .gitignore

Co-Authored-By: Paperclip <noreply@paperclip.ing>

src/services/waitlistNotify.ts

@@ -0,0 +1,63 @@
+import { and, eq, getDb, waitlistEntries, clients, pets, services } from "@groombook/db";
+import { buildWaitlistNotificationEmail, sendEmail } from "./email.js";
+
+export async function notifyWaitlistForAppointment(
+  appointmentId: string,
+  appointmentDate: string,
+  appointmentTime: string,
+  serviceId: string
+): Promise<void> {
+  const db = getDb();
+
+  const matchingEntries = await db
+    .select()
+    .from(waitlistEntries)
+    .where(
+      and(
+        eq(waitlistEntries.preferredDate, appointmentDate),
+        eq(waitlistEntries.preferredTime, appointmentTime),
+        eq(waitlistEntries.serviceId, serviceId),
+        eq(waitlistEntries.status, "active")
+      )
+    );
+
+  for (const entry of matchingEntries) {
+    const [client] = await db
+      .select({ name: clients.name, email: clients.email, emailOptOut: clients.emailOptOut })
+      .from(clients)
+      .where(eq(clients.id, entry.clientId))
+      .limit(1);
+
+    if (!client?.email || client.emailOptOut) continue;
+
+    const [pet] = await db
+      .select({ name: pets.name })
+      .from(pets)
+      .where(eq(pets.id, entry.petId))
+      .limit(1);
+
+    const [service] = await db
+      .select({ name: services.name })
+      .from(services)
+      .where(eq(services.id, entry.serviceId))
+      .limit(1);
+
+    if (!pet || !service) continue;
+
+    const email = buildWaitlistNotificationEmail(client.email, {
+      clientName: client.name,
+      petName: pet.name,
+      serviceName: service.name,
+      preferredDate: appointmentDate,
+      preferredTime: appointmentTime,
+    });
+
+    const sent = await sendEmail(email);
+    if (sent) {
+      await db
+        .update(waitlistEntries)
+        .set({ status: "notified", notifiedAt: new Date(), updatedAt: new Date() })
+        .where(eq(waitlistEntries.id, entry.id));
+    }
+  }
+}