Add hoster/client distribution metrics (#211)

* Add hoster/client distribution metrics
* Optimize query

Author: mre

db_schema/queries/v1/reportHosterClients.sql

@@ -0,0 +1,25 @@
+-- Returns client distribution for the specified date range
+
+WITH clients_data AS (
+    SELECT
+        s.dim_name as client_name,
+        SUM(h.value) as total_downloads
+    FROM hosterPodcastMetrics h
+    JOIN subdimensions s ON h.subdimension = s.dim_id
+    WHERE h.account_id = @podcast_id
+        AND h.dimension = 'clients'
+        AND h.start = h.end
+        AND h.start BETWEEN @start_date AND @end_date
+    GROUP BY s.dim_id, s.dim_name
+    HAVING total_downloads > 0
+)
+
+SELECT
+    client_name,
+    total_downloads,
+    ROUND(
+        (total_downloads * 100.0 / SUM(total_downloads) OVER()),
+        2
+    ) as percentage
+FROM clients_data
+ORDER BY total_downloads DESC;

db_schema/queries/v1/reportHosterPlatforms.sql

@@ -0,0 +1,25 @@
+-- Returns platform distribution for the specified date range
+
+WITH platforms_data AS (
+    SELECT
+        s.dim_name as platform_name,
+        SUM(h.value) as total_downloads
+    FROM hosterPodcastMetrics h
+    JOIN subdimensions s ON h.subdimension = s.dim_id
+    WHERE h.account_id = @podcast_id
+        AND h.dimension = 'platforms'
+        AND h.start = h.end
+        AND h.start BETWEEN @start_date AND @end_date
+    GROUP BY s.dim_id, s.dim_name
+    HAVING total_downloads > 0
+)
+
+SELECT
+    platform_name,
+    total_downloads,
+    ROUND(
+        (total_downloads * 100.0 / SUM(total_downloads) OVER()),
+        2
+    ) as percentage
+FROM platforms_data
+ORDER BY total_downloads DESC;