Added semantic episode searching

packages/orchestration-service/src/services/qdrant.js

@@ -0,0 +1,27 @@
+const {getEnv, QDRANT, COLLECTIONS } = require('@nexusai/shared')
+
+const BASE_URL = getEnv('QDrant_URL', QDRANT.DEFAULT_URL);
+
+async function searchEpisodes( vector, {limit = 5, scoreThreshold = 0.75, sessionId } = {}) {
+    const body = {vector, limit, score_threshold: scoreThreshold, with_payload: true};
+
+    if (sessionId) {
+        body.filter = { must: [{key: 'sessionId', match: {value: sessionId} }] };
+    }
+
+    const res = await fetch (
+        `${BASE_URL}/collections/${COLLECTIONS.EPISODES}/points/search`,
+        {
+            method: 'POST',
+            headers: {'Content-Type': 'application/json'}, 
+            body: JSON.stringify(body)
+        }
+    );
+
+    if (!res.ok) throw new Error(`QDrant error: ${res.status}`);
+
+    const data = await res.json();
+    return data.result;
+}
+
+module.exports = { searchEpisodes };