config bug fix (#96)

Co-authored-by: Ubuntu <[email protected]>

Author: cheungdaven

src/agrag/agrag.py

@@ -126,7 +126,7 @@ def __init__(
         self.model_ids = model_ids
 
         self.config = config_file or self._load_preset()
-        self.args = Arguments(self.config) if not self.args else self.args
+        self.args = Arguments(self.config) if self.config else self.args
 
         # will short-circuit to provided data_dir if config value also provided
         self.data_dir = data_dir or self.args.data_dir

src/agrag/configs/presets/medium_quality_config.yaml

@@ -13,10 +13,10 @@ embedding:
   embedding_model_platform: bedrock
   embedding_model_platform_args:
     bedrock_aws_region: us-west-2
+    hf_tokenizer_params: 
+      truncation: true
+      padding: true
   normalize_embeddings: false
-  hf_tokenizer_params: 
-    truncation: true
-    padding: true
   normalization_params: {'p': 2, 'dim': 1, 'eps': 1e-12}
   embedding_batch_size: 64