Keep bot operational when forecast model is unavailable

crypto_spot_bot/training_coordination.py

@@ -23,7 +23,9 @@ ALLOWED_TRAINING_ARTIFACTS = {
 RUNNING_TIMEOUT = timedelta(hours=12)
 ONLINE_WINDOW = timedelta(minutes=3)
 MAX_ARTIFACT_CHUNK_BYTES = 1024 * 1024
-MAX_ARTIFACT_BYTES = 64 * 1024 * 1024
+# Independent per-symbol ensembles are intentionally larger than pooled models.
+# Keep a bounded limit, but leave enough room for the supported 12-symbol bundle.
+MAX_ARTIFACT_BYTES = 256 * 1024 * 1024
 MAX_ARTIFACT_CHUNKS = 1024
 REQUIRED_MODEL_BUNDLE = set(ALLOWED_TRAINING_ARTIFACTS)
 
@@ -378,13 +380,19 @@ def _safe_parameters(value: Any) -> dict[str, Any]:
         "dropouts",
         "epochs",
         "holdout_window",
+        "ensemble_seeds",
+        "selection_folds",
+        "learning_rate",
+        "weight_decay",
+        "pooled",
         "resume_candidate",
     }
     result = {key: value[key] for key in allowed if key in value}
     for key, low, high in (
-        ("limit", 500, 5000),
+        ("limit", 500, 20000),
         ("epochs", 1, 200),
         ("holdout_window", 64, 1000),
+        ("selection_folds", 1, 12),
     ):
         if key not in result:
             continue
@@ -406,9 +414,21 @@ def _safe_parameters(value: Any) -> dict[str, Any]:
             if item.strip().lower() in {"lstm", "gru"}
         ]
         result["architectures"] = ",".join(architectures) or "lstm,gru"
-    for key in ("lookbacks", "hidden_sizes", "layers", "dropouts"):
+    for key in ("lookbacks", "hidden_sizes", "layers", "dropouts", "ensemble_seeds"):
         if key in result:
             result[key] = str(result[key])[:200]
+    for key, low, high in (
+        ("learning_rate", 0.00001, 0.1),
+        ("weight_decay", 0.0, 0.1),
+    ):
+        if key not in result:
+            continue
+        try:
+            result[key] = max(low, min(high, float(result[key])))
+        except (TypeError, ValueError):
+            result.pop(key, None)
+    if "pooled" in result:
+        result["pooled"] = result["pooled"] is True
     if "resume_candidate" in result:
         result["resume_candidate"] = result["resume_candidate"] is True
     return result