DuckDB Spark API is incompatible with the PySpark API's `spark.createDataFrame(list of dict)`

### What happens?

The DuckDB Spark API is incompatible with the PySpark API's `spark.createDataFrame(list of dict)` method.

### To Reproduce

```python
from duckdb.experimental.spark.sql import SparkSession as DuckdbSparkSession
from pyspark.sql import SparkSession

sql_text = "SELECT * FROM t0"
data = [
{"c0": "1969-12-21"}
]
spark = SparkSession.builder.getOrCreate()
df = spark.createDataFrame(data)
df.createOrReplaceTempView("t0")

print("PySpark SQL result:")
pyspark_result = spark.sql(sql_text)
pyspark_result.show()

duckdb_spark = DuckdbSparkSession.builder.getOrCreate()
df = duckdb_spark.createDataFrame(data)
df.createOrReplaceTempView("t0")

print("Duckdb Spark SQL result: ")
duckdb_spark_result = duckdb_spark.sql(sql_text)
duckdb_spark_result.show()
```
```bash
PySpark SQL result:
+----------+
| c0|
+----------+
|1969-12-21|
+----------+

Duckdb Spark SQL result:
┌─────────┐
│ col0 │
│ varchar │
├─────────┤
│ c0 │
└─────────┘
```

### OS:

x86_64 Ubuntu 24.04 Linux-6.14.0-35-generic-x86_64-with-glibc2.39

### DuckDB Version:

1.4.2

### DuckDB Client:

Python

### Hardware:

_No response_

### Full Name:

asddfl

### Affiliation:

xxx

### Did you include all relevant configuration (e.g., CPU architecture, Linux distribution) to reproduce the issue?

- [x] Yes, I have

### Did you include all code required to reproduce the issue?

- [x] Yes, I have

### Did you include all relevant data sets for reproducing the issue?

Yes

Commencez par duckdb.experimental.spark.sql.SparkSession.createDataFrame et exécutez la reproduction Python fournie avec la DuckDB Spark API et PySpark. Comparez la sortie résultante de la vue temporaire et considérez l’issue comme terminée lorsque DuckDB produit le même nom de colonne et la même valeur de ligne que PySpark pour une liste de dictionnaires.

Rédigé par le modèle d'indexation à partir du texte de l'issue.