fix: explicit milliseconds precision of timestamp columns

scripts/clean_duplicates.sql

@@ -0,0 +1,12 @@
+DELETE t1
+FROM heartbeats t1
+         INNER JOIN heartbeats t2
+WHERE t1.id < t2.id
+  AND t1.time = t2.time
+  AND t1.entity = t2.entity
+  AND t1.is_write = t2.is_write
+  AND t1.branch = t2.branch
+  AND t1.editor = t2.editor
+  AND t1.machine = t2.machine
+  AND t1.operating_system = t2.operating_system
+  AND t1.user_id = t2.user_id;

scripts/count_duplicates_by_user.sql

@@ -1,11 +1,8 @@
 SELECT s2.user_id, sum(c) as count, total, (sum(c) / total) as ratio
 FROM (
-         SELECT time,
-                user_id,
-                entity,
-                COUNT(time) as c
+         SELECT time, user_id, entity, is_write, branch, editor, machine, operating_system, COUNT(time) as c
          FROM heartbeats
-         GROUP BY time, user_id, entity
+         GROUP BY time, user_id, entity, is_write, branch, editor, machine, operating_system
          HAVING COUNT(time) > 1
      ) s2
          LEFT JOIN (SELECT user_id, count(id) AS total FROM heartbeats GROUP BY user_id) s3 ON s2.user_id = s3.user_id