Use python standard logging framework for app logs

- Stop passing verbose flag around app methods
- Minor remap of verbosity levels to match python logging framework levels
  - verbose = 0 maps to logging.WARN
  - verbose = 1 maps to logging.INFO
  - verbose >=2 maps to logging.DEBUG
- Minor clean-up of app: unused modules, conversation file opening

src/utils/config.py

@@ -20,23 +20,21 @@ class ProcessorType(str, Enum):
 
 
 class TextSearchModel():
-    def __init__(self, entries, corpus_embeddings, bi_encoder, cross_encoder, top_k, verbose):
+    def __init__(self, entries, corpus_embeddings, bi_encoder, cross_encoder, top_k):
         self.entries = entries
         self.corpus_embeddings = corpus_embeddings
         self.bi_encoder = bi_encoder
         self.cross_encoder = cross_encoder
         self.top_k = top_k
-        self.verbose = verbose
 
 
 class ImageSearchModel():
-    def __init__(self, image_names, image_embeddings, image_metadata_embeddings, image_encoder, verbose):
+    def __init__(self, image_names, image_embeddings, image_metadata_embeddings, image_encoder):
         self.image_encoder = image_encoder
         self.image_names = image_names
         self.image_embeddings = image_embeddings
         self.image_metadata_embeddings = image_metadata_embeddings
         self.image_encoder = image_encoder
-        self.verbose = verbose
 
 
 @dataclass
@@ -49,12 +47,11 @@ class SearchModels():
 
 
 class ConversationProcessorConfigModel():
-    def __init__(self, processor_config: ConversationProcessorConfig, verbose: bool):
+    def __init__(self, processor_config: ConversationProcessorConfig):
         self.openai_api_key = processor_config.openai_api_key
         self.conversation_logfile = Path(processor_config.conversation_logfile)
         self.chat_session = ''
         self.meta_log = []
-        self.verbose = verbose
 
 
 @dataclass