Add pagination to docstring"

src/server.py

@@ -102,7 +102,9 @@ def get_all_truths(
     page: int = 0,
     db: redis.Redis = Depends(get_db_factory())
 ):
-    """Retrieves all stored truths"""
+    """Retrieves all stored truths
+    
+    If ?limit is a positive integer, pagination will be enabled."""
     keys = db.keys()
     if rich is False:
         return [