fix(client): cache subsequent clients (#2963)

* fix(client): cache subsequent clients

we dont need to recreate a client if
its config hasnt changed

fixes #2954

* handle circular structures

* make cache generic

packages/client/lib/single-entry-cache.ts

@@ -0,0 +1,37 @@
+export default class SingleEntryCache<K, V> {
+  #cached?: V;
+  #serializedKey?: string;
+
+  /**
+   * Retrieves an instance from the cache based on the provided key object.
+   *
+   * @param keyObj - The key object to look up in the cache.
+   * @returns The cached instance if found, undefined otherwise.
+   *
+   * @remarks
+   * This method uses JSON.stringify for comparison, which may not work correctly
+   * if the properties in the key object are rearranged or reordered.
+   */
+  get(keyObj?: K): V | undefined {
+    return JSON.stringify(keyObj, makeCircularReplacer()) === this.#serializedKey ? this.#cached : undefined;
+  }
+
+  set(keyObj:  K | undefined, obj: V) {
+    this.#cached = obj;
+    this.#serializedKey = JSON.stringify(keyObj, makeCircularReplacer());
+  }
+}
+
+function makeCircularReplacer() {
+  const seen = new WeakSet();
+  return function serialize(_: string, value: any) {
+    if (value && typeof value === 'object') {
+      if (seen.has(value)) {
+        return 'circular';
+      }
+      seen.add(value);
+      return value;
+    }
+    return value;
+  }
+}