Mark J-SPAW_LA saturated; bump manifest schema_version 1->2

Rides the package 0.4.0 schema release (manifest schema const:1->2). Declares
J-SPAW_LA saturated (status: saturated, saturated_at: 2026-06-20).

ranking_version stays v3 — the saturation field is inert until the arena
active_core_ids consumer ships (stage 5); this only stages the data + schema
version. MUST be pushed only after the 0.4.0 package is deployed and the Space
is RUNNING on it (const:2 package rejects an sv1 manifest).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CHANGELOG.yaml

@@ -39,3 +39,5 @@ events:
   - {date: 2026-06-10, type: note, text: "Re-ingest to subscribe PyAra for webhook routing"}
   - {date: 2026-06-10, type: dataset_added, text: "XMAD added to Core (XMAD-Bench Cross-Domain Multilingual Audio Deepfake, arXiv 2506.00462; CC BY-NC-SA 4.0; 7 langs ar/de/en/es/ro/ru/zh; 16kHz raw-embed; M-AILABS/MASC spoof-only as real audio absent, 46773 missing-real rows dropped; 368,085 trials: 160,656 bonafide / 207,429 spoof)", dataset_id: "SpeechAntiSpoofingBenchmarks/XMAD"}
   - {date: 2026-06-10, type: note, text: "Re-ingest to subscribe XMAD for webhook routing"}
+  - {date: 2026-06-20, type: note, text: "manifest schema_version 1->2 (rides package 0.4.0): dataset_entry gains status/saturated_at/metric/category/penalty/verification + top-level contamination_overrides; submission schema 4->5 (enum, back-compat). ranking_version stays v3 (no scoring-rule change yet)"}
+  - {date: 2026-06-20, type: note, text: "J-SPAW_LA declared saturated (status: saturated, saturated_at: 2026-06-20); field is inert until the arena active_core_ids consumer ships (stage 5)", dataset_id: "SpeechAntiSpoofingBenchmarks/J-SPAW_LA"}

manifest.yaml

@@ -1,5 +1,5 @@
 ranking_version: v3
-schema_version: 1
+schema_version: 2
 
 metrics_in_use:
   - eer_percent
@@ -72,6 +72,8 @@ core_set:
     revision: b900644bf4af592f8cbb2508a61d05e9849ca6dd
     n_trials: 2397
     paper_url: https://doi.org/10.21437/Interspeech.2025-352
+    status: saturated
+    saturated_at: 2026-06-20
   - id: SpeechAntiSpoofingBenchmarks/ODSS
     revision: 1968e6d0ef141c4572073695bdc1d17a8706177f
     n_trials: 26954