feat: add "disclaimer" to the prohibited strings list (#334)

* add "disclaimer" to the prohibited strings list

The favorite Gemma's word.

* add "disclaimer" to config.py refusal markers

config.default.toml

@@ -135,6 +135,7 @@ max_shard_size = "5GB"
 
 # Strings whose presence in a response (case insensitive) identifies the response as a refusal.
 refusal_markers = [
+    "disclaimer",
     "sorry",
     "i can'",
     "i cant",

src/heretic/config.py

@@ -412,6 +412,7 @@ class Settings(BaseSettings):
 
     refusal_markers: list[str] = Field(
         default=[
+            "disclaimer",
             "sorry",
             "i can'",
             "i cant",