feat: ( payment ) create payment microservice

apps/edr-payment-api/src/config/app.config.ts

@@ -0,0 +1,21 @@
+import { registerAs } from "@nestjs/config";
+
+export default registerAs("app", () => ({
+  port: parseInt(process.env.PORT ?? "3003", 10),
+  /**
+   * Shared secret for service-to-service auth (apps -> /payments/*, payment -> mark-paid).
+   * Required in production; in development an empty value disables the guard with a warning.
+   * TODO: integrate @tria-plc IAM / mTLS as the long-term mechanism (docs/payment-service §14).
+   */
+  serviceAuthToken: process.env.SERVICE_AUTH_TOKEN ?? "",
+  reconciliation: {
+    /** How often the stale-intent sweep runs. */
+    sweepIntervalMs: parseInt(
+      process.env.RECONCILE_SWEEP_INTERVAL_MS ?? "60000",
+      10,
+    ),
+    /** An intent is "stale" when non-terminal and untouched for this long. */
+    staleAfterMs: parseInt(process.env.RECONCILE_STALE_AFTER_MS ?? "60000", 10),
+    batchSize: parseInt(process.env.RECONCILE_BATCH_SIZE ?? "20", 10),
+  },
+}));