Add raw prediction manifest for 2025-09

predictions/raw_2025/month=09/manifest.json

@@ -0,0 +1,12 @@
+{
+  "format": "ASR_CYGNSS_RAW_PREDICTIONS_2025_V2",
+  "created_utc": "2026-08-02T05:27:17.287232+00:00",
+  "month": "2025-09",
+  "rows": 936923,
+  "source_collocation": "data/collocations/year=2025/month=09/part-000.parquet",
+  "remote_path": "predictions/raw_2025/month=09/part-000.parquet",
+  "sha256": "990dc9bfa4f660f3ea7b921a0352b3dfc822bb5d646152b9585e34073fac0c75",
+  "bytes": 63143560,
+  "time_min_sec_since_2015": 336614864.749261,
+  "time_max_sec_since_2015": 339204709.499261
+}