fix: FalkorDB result parsing, embeddings routing, triples query response, graph visualization

- Fix FalkorDB triples query: client v5 returns objects not arrays, use named field access
- Fix embeddings service: align spec names to "embeddings-request"/"embeddings-response"
- Fix client triplesQuery: read `triples` field instead of `response` from backend
- Fix graph page crash: guard against non-array triples, accept literals as entity nodes
- Add seed:demo script for AI industry knowledge graph (254 triples, 64 entities)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ts/packages/client/src/socket/trustgraph-socket.ts

@@ -1815,7 +1815,7 @@ export class FlowApi {
         undefined,
         this.flowId,
       )
-      .then((r) => r.response);
+      .then((r) => r.triples ?? r.response ?? []);
   }
 
   /**