implement hunt data logging (partial #82)

patch-schema/08-kill-counts.sql

@@ -0,0 +1,12 @@
+CREATE TABLE public.kill_logs
+(
+    id serial,
+    character_id integer NOT NULL,
+    monster integer NOT NULL,
+    quantity integer NOT NULL,
+    timestamp timestamp with time zone NOT NULL,
+    PRIMARY KEY (id)
+);
+
+ALTER TABLE IF EXISTS public.guild_characters
+    ADD COLUMN box_claimed timestamp with time zone DEFAULT now();