fix(queries): count custom events correctly on the hourly rollup, trying to address greptile findings

`website_event_stats_hourly` sets `views` to
`sumIf(1, event_type NOT IN (2, 5))`, so `views` is 0 on custom event
rows and the `events_count` join was summing zeroes. Switched it to
`sum(length(event_name))`, which is how `getWebsiteSessionStats`
already counts custom events on that table.

Also dropped the `getEventExpandedMetrics` change from the previous
commit. That report is filtered to custom events, so every visit it
lists has already fired at least one, and its `bounces` column counts
visits where the event fired exactly once rather than visits with a
single pageview. The threshold rule does not apply there, so the query
is left untouched.

src/queries/sql/events/getEventExpandedMetrics.ts

@@ -1,5 +1,5 @@
 import clickhouse from '@/lib/clickhouse';
-import { BOUNCE_THRESHOLD, EVENT_TYPE, FILTER_COLUMNS, SESSION_COLUMNS } from '@/lib/constants';
+import { EVENT_TYPE, FILTER_COLUMNS, SESSION_COLUMNS } from '@/lib/constants';
 import { CLICKHOUSE, PRISMA, runQuery } from '@/lib/db';
 import prisma from '@/lib/prisma';
 import type { QueryFilters } from '@/lib/types';
@@ -54,7 +54,7 @@ async function relationalQuery(
       sum(t.c) as "pageviews",
       count(distinct t.session_id) as "visitors",
       count(distinct t.visit_id) as "visits",
-      sum(case when t.c = 1 and (t.events_count - t.c) < ${BOUNCE_THRESHOLD} then 1 else 0 end) as "bounces",
+      sum(case when t.c = 1 then 1 else 0 end) as "bounces",
       sum(${getTimestampDiffSQL('t.min_time', 't.max_time')}) as "totaltime"
     from (
       select
@@ -63,19 +63,10 @@ async function relationalQuery(
         website_event.visit_id,
         count(*) as "c",
         min(website_event.created_at) as "min_time",
-        max(website_event.created_at) as "max_time",
-        max((
-          select count(*)
-          from website_event we2
-          where we2.website_id = website_event.website_id
-            and we2.session_id = website_event.session_id
-            and we2.visit_id = website_event.visit_id
-            and we2.created_at between {{startDate}} and {{endDate}}
-            and we2.event_type = ${EVENT_TYPE.customEvent}
-        )) as "events_count"
+        max(website_event.created_at) as "max_time"
       from website_event
       ${cohortQuery}
-      ${joinSessionQuery}
+      ${joinSessionQuery}  
       where website_event.website_id = {{websiteId::uuid}}
         and website_event.created_at between {{startDate}} and {{endDate}}
         ${filterQuery}
@@ -113,7 +104,7 @@ async function clickhouseQuery(
       sum(t.c) as "pageviews",
       uniq(t.session_id) as "visitors",
       uniq(t.visit_id) as "visits",
-      sumIf(1, t.c = 1 and (toInt64(ifNull(e.events_count, 0)) - toInt64(t.c)) < ${BOUNCE_THRESHOLD}) as "bounces",
+      sum(if(t.c = 1, 1, 0)) as "bounces",
       sum(max_time-min_time) as "totaltime"
     from (
       select
@@ -131,15 +122,7 @@ async function clickhouseQuery(
         ${filterQuery}
       group by name, session_id, visit_id
     ) as t
-    left join (
-      select session_id, visit_id, toUInt32(count()) as events_count
-      from website_event
-      where website_id = {websiteId:UUID}
-        and created_at between {startDate:DateTime64} and {endDate:DateTime64}
-        and event_type = ${EVENT_TYPE.customEvent}
-      group by session_id, visit_id
-    ) as e using (session_id, visit_id)
-    group by name
+    group by name 
     order by visitors desc, visits desc
     limit ${limit}
     offset ${offset}

src/queries/sql/getWebsiteStats.ts

@@ -153,7 +153,7 @@ async function clickhouseQuery(
       group by session_id, visit_id
     ) as t
     left join (
-      select session_id, visit_id, toUInt32(sumIf(views, event_type = ${EVENT_TYPE.customEvent})) as events_count
+      select session_id, visit_id, toUInt32(sum(length(event_name))) as events_count
       from website_event_stats_hourly
       where website_id = {websiteId:UUID}
         and created_at between {startDate:DateTime64} and {endDate:DateTime64}