refactor: rinomina step-8 → ingestion

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

rag.py

@@ -197,7 +197,7 @@ def _build_epilog() -> str:
             if names:
                 lines += ["", f"Collection disponibili: {', '.join(names)}"]
             else:
-                lines += ["", "Nessuna collection trovata — eseguire prima: python step-8/ingest.py"]
+                lines += ["", "Nessuna collection trovata — eseguire prima: python ingestion/ingest.py"]
         except Exception:
             pass
     return "\n".join(lines)
@@ -208,7 +208,7 @@ def main() -> int:
         description=(
             "Pipeline RAG interattiva\n\n"
             "Risponde a domande in linguaggio naturale su un documento\n"
-            "indicizzato in ChromaDB da step-8/ingest.py."
+            "indicizzato in ChromaDB da ingestion/ingest.py."
         ),
         epilog=_build_epilog(),
         formatter_class=argparse.RawDescriptionHelpFormatter,
@@ -218,7 +218,7 @@ def main() -> int:
         required=True,
         help=(
             "Nome della collection ChromaDB da interrogare. "
-            "Le collection vengono create da: python step-8/ingest.py --stem <nome>"
+            "Le collection vengono create da: python ingestion/ingest.py --stem <nome>"
         ),
     )
     args = parser.parse_args()
@@ -231,14 +231,14 @@ def main() -> int:
     print()
 
     if not CHROMA_DIR.exists():
-        print("❌ chroma_db/ non trovata — esegui prima step-8")
+        print("❌ chroma_db/ non trovata — esegui prima ingestion")
         return 1
 
     client = chromadb.PersistentClient(path=str(CHROMA_DIR))
     collections = [c.name for c in client.list_collections()]
     if args.stem not in collections:
         print(f"❌ Collection '{args.stem}' non trovata in chroma_db/")
-        print(f"   → python step-8/ingest.py --stem {args.stem}")
+        print(f"   → python ingestion/ingest.py --stem {args.stem}")
         return 1
 
     collection = client.get_collection(args.stem)