perf: wait for Neo4j index before edge loading in enrich

Added db.awaitIndexes() call after creating the id index, before starting
edge bulk-load. Without this, the first edge batches run without an index
on 140K nodes, making MATCH extremely slow.

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

Author: aksOps

src/main/java/io/github/randomcodespace/iq/cli/EnrichCommand.java

@@ -225,11 +225,20 @@ private int enrichFromCache(AnalysisCache cache, Path root, NumberFormat nf, Ins
                 }
             }
 
-            // Create index on id for edge resolution
+            // Create index on id for edge resolution and wait for it to come online
+            CliOutput.info("  Creating index on node ID...");
             try (Transaction tx = db.beginTx()) {
                 tx.execute("CREATE INDEX IF NOT EXISTS FOR (n:CodeNode) ON (n.id)");
                 tx.commit();
             }
+            // Wait for index to be populated (critical for edge MATCH performance)
+            try (Transaction tx = db.beginTx()) {
+                tx.execute("CALL db.awaitIndexes(300)");
+            } catch (Exception e) {
+                log.debug("Index await returned: {}", e.getMessage());
+                // Index may already be online, continue
+            }
+            CliOutput.info("  Index ready");
 
             // Bulk-load edges
             // Use validated edges from flush