feat: implement in-memory storage for Figma extraction data with automated pruning

bridge-server/src/storage.js

@@ -3,7 +3,7 @@
  * Each extraction is stored with a unique ID, timestamp, and the full payload.
  */
 /** Maximum number of extractions to keep in memory */
-const MAX_EXTRACTIONS = 10;
+const MAX_EXTRACTIONS = 1;
 class ExtractionStore {
     constructor() {
         this.extractions = new Map();

bridge-server/src/storage.ts

@@ -30,7 +30,7 @@ export interface Extraction {
 }
 
 /** Maximum number of extractions to keep in memory */
-const MAX_EXTRACTIONS = 10;
+const MAX_EXTRACTIONS = 1;
 
 class ExtractionStore {
   private extractions: Map<string, Extraction> = new Map();