chore: add training data, backups, and research docs

- Add model backups from training sessions
- Add training data parquet file
- Add risk state persistence file
- Add research documents (Gemini analysis)
- Update architecture docs

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

data/retrain_history.txt

@@ -0,0 +1,2 @@
+2026-02-05T00:04:17.960859+07:00
+2026-02-06T05:01:36.805493+07:00

data/risk_state.txt

@@ -0,0 +1,5 @@
+date:2026-02-06
+daily_loss:177.60000000000002
+daily_profit:21.73
+consecutive_losses:2
+total_loss:155.87