docs(manifest): enrich manifest v2 with source files, catalog sha256, builder commit and environment

wanjuan_full_corpus/T2_JOINT_pretokenized_v2/train/manifest.json

@@ -4023,5 +4023,16 @@
       "sha256": "b4f1eb82c2eeb9560f560b98e37b1f5b94dc0548479ef420bb449f3c226a4bd1"
     }
   ],
-  "unsupported_samples_file": "unsupported_samples_train.jsonl.gz"
+  "unsupported_samples_file": "unsupported_samples_train.jsonl.gz",
+  "source_id": "wanjuan_vietnamese_v1",
+  "unsupported_samples_sha256": "e540fafa30cda563e056f942375bd329fd7fa134977da43b5db8fc5d0b9384d7",
+  "builder_commit": "6ed88f65c635fde38c16542100903914f43609aa",
+  "builder_script": "scripts/build_v2_runner.py",
+  "source_files_count": 32,
+  "runtime_environment": {
+    "python": "3.13.11",
+    "system": "Linux",
+    "machine": "x86_64",
+    "node": "8fc8a709-d4d3-48d1-8189-27a01adb70e9-9gzxp"
+  }
 }