refactor(db): replace sqlc with handwritten pgx repos

- Finish Paddle-to-Stripe billing migration; drop paddle/stripe libs
- Renumber migrations; add 00012 memberships+manage_token,
  00013 location_type_capacity
- Add tests: admin, auth, bookings customer service
- Remove graphify-out artifacts and stale env files

Authored By: TDvorak <[email protected]>

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

apps/frontend/src/lib/paddle.ts

@@ -1,23 +0,0 @@
-import { initializePaddle, type Paddle } from "@paddle/paddle-js";
-
-const paddleToken = import.meta.env.VITE_PADDLE_CLIENT_TOKEN ?? "";
-const paddleEnvironment = (import.meta.env.VITE_PADDLE_ENV ?? "sandbox").toLowerCase() === "live" ? "production" : "sandbox";
-
-let paddlePromise: Promise<Paddle | undefined> | null = null;
-
-export function paddleConfigured() {
-  return paddleToken.trim() !== "";
-}
-
-export async function getPaddle() {
-  if (!paddleConfigured()) {
-    return undefined;
-  }
-  if (!paddlePromise) {
-    paddlePromise = initializePaddle({
-      environment: paddleEnvironment,
-      token: paddleToken,
-    });
-  }
-  return paddlePromise;
-}

apps/frontend/src/lib/stripe.ts

@@ -1,19 +0,0 @@
-import { loadStripe, type Stripe } from "@stripe/stripe-js";
-
-const stripePublishableKey = import.meta.env.VITE_STRIPE_PUBLISHABLE_KEY ?? "";
-
-let stripePromise: Promise<Stripe | null> | null = null;
-
-export function stripeConfigured() {
-  return stripePublishableKey.trim() !== "";
-}
-
-export async function getStripe() {
-  if (!stripeConfigured()) {
-    return null;
-  }
-  if (!stripePromise) {
-    stripePromise = loadStripe(stripePublishableKey);
-  }
-  return stripePromise;
-}