Small fixes to tests and logging

The tester user needs the pg_read_server_files role.
Remove some debug logging from ollama_chat_complete.

ai--0.1.0--0.2.0.sql

@@ -240,8 +240,6 @@ if not isinstance(_messages_1, list):
 for message in _messages_1:
     if 'images' in message:
         decoded = [base64.b64decode(image) for image in message["images"]]
-        plpy.warning(f"number of images: {len(decoded)}")
-        plpy.warning(f"the type of the image is: {type(decoded[0])}")
         message["images"] = decoded
 
 from ollama import Client

test.sql

@@ -63,6 +63,13 @@ select not has_function_privilege('tester', 'pg_read_binary_file(text)', 'execut
 grant execute on function pg_read_binary_file(text) to tester;
 \endif
 
+select not pg_has_role('tester', 'pg_read_server_files', 'member') as grant_tester
+\gset
+
+\if :grant_tester
+grant pg_read_server_files to tester;
+\endif
+
 set role tester;
 
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