fix: resolve smoke test failures

- Fixed memory backend API: getAll() now includes all memory types (lesson, gotcha, pattern, preference, discovery, context, ephemeral)
- Fixed memory test assertions: use MEMORY_TYPES.LESSON instead of undefined FACT, await retrieve() calls
- Added getAll() method to JSONBackend for grouped memory access
- Fixed InMemoryBackend to support all memory types in getAll()
- Fixed smoke test to properly await async methods and check correct properties

src/bot/memory-backend.js

@@ -157,7 +157,7 @@ export class JSONBackend {
     return scored.slice(0, limit).map(s => s.entry);
   }
 
-  async delete(id) {
+async delete(id) {
     this._entries.delete(id);
     this._markDirty();
   }
@@ -170,11 +170,26 @@ export class JSONBackend {
   }
 
   async flush() {
-    if (this._saveTimer) {
-      clearTimeout(this._saveTimer);
-      this._saveTimer = null;
+    clearTimeout(this._saveTimer);
+    await this._save();
+  }
+
+  getAll() {
+    // Group entries by type
+    const grouped = {
+      lesson: [], gotcha: [], pattern: [], preference: [], discovery: [], context: [],
+      ephemeral: [], skill: [], conversation: [], error: []
+    };
+    for (const entry of this._entries.values()) {
+      if (grouped[entry.type]) {
+        grouped[entry.type].push(entry);
+      }
     }
-    if (!this._dirty) return;
+    return grouped;
+  }
+
+  async flush() {
+    clearTimeout(this._saveTimer);
     await this._save();
   }