fix(backtest): inspect the authoritative strategy inside runner bundles

crates/fidc-core/src/pattern_context.rs

@@ -212,6 +212,11 @@ pub fn build_dataset_context(
 }
 
 pub fn specs_in_value(value: &Value) -> Result<Vec<PatternSpec>, String> {
+    // A runner bundle also contains source/extract copies. Follow the same
+    // authoritative spec selection as the execution loader, not those copies.
+    if let Some(spec) = value.get("strategySpec").or_else(|| value.get("strategy_spec")) {
+        return specs_in_value(spec);
+    }
     let mut specs = Vec::new();
     match value {
         Value::String(text) => specs.extend(crate::daily_patterns::expression_specs(text)?),
@@ -268,9 +273,15 @@ mod tests {
         for (pool_key, source_key) in [("stockPool", "sourceCode"), ("stock_pool", "source_code")] {
             let value = json!({pool_key:pool,source_key:source,"runtimeExpressions":{"trading":{"buyFilterExpr":expr}}});
             assert_eq!(specs_in_value(&value).unwrap().len(), 2);
+            for wrapper in ["strategySpec", "strategy_spec"] {
+                let bundle = json!({wrapper:value,"strategy_source":{"source_code":source},
+                    "strategy_extract":{"parameters":{"source_code":source}}});
+                assert_eq!(specs_in_value(&bundle).unwrap().len(), 2);
+            }
             let mut invalid = value.clone();
             invalid[pool_key]["exit_signals"][0]["when_expr"] = json!("pattern_signal(not-json)");
             assert!(specs_in_value(&invalid).is_err(), "invalid actual conditions must still fail");
+            assert!(specs_in_value(&json!({"strategySpec":invalid})).is_err());
         }
         assert_eq!(specs_in_value(&json!({"sourceCode":format!("risk.stop_loss({expr})")})).unwrap().len(),1);
     }