feat(usage-query): add 30m to VALID_INTERVALS

Fills the gap between 15m and 1h. Maps to ClickHouse
`INTERVAL 30 MINUTE` like the other minute variants. Existing
sub-hour entries (1m, 5m, 15m) already worked end-to-end via
the aggregated find() path.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: lohanidamodar

.gitignore

@@ -1 +1,3 @@
-vendor/
+vendor/
+.phpunit.result.cache
+.phpunit.cache/

.phpunit.result.cache

@@ -39,6 +39,7 @@ class UsageQuery extends Query
         '1m' => 'INTERVAL 1 MINUTE',
         '5m' => 'INTERVAL 5 MINUTE',
         '15m' => 'INTERVAL 15 MINUTE',
+        '30m' => 'INTERVAL 30 MINUTE',
         '1h' => 'INTERVAL 1 HOUR',
         '1d' => 'INTERVAL 1 DAY',
         '1w' => 'INTERVAL 1 WEEK',

src/Usage/UsageQuery.php

@@ -21,7 +21,7 @@ public function testGroupByIntervalCreation(): void
 
     public function testGroupByIntervalAllValidIntervals(): void
     {
-        $validIntervals = ['1m', '5m', '15m', '1h', '1d', '1w', '1M'];
+        $validIntervals = ['1m', '5m', '15m', '30m', '1h', '1d', '1w', '1M'];
 
         foreach ($validIntervals as $interval) {
             $query = UsageQuery::groupByInterval('time', $interval);
@@ -114,6 +114,7 @@ public function testValidIntervalsConstant(): void
         $this->assertArrayHasKey('1m', UsageQuery::VALID_INTERVALS);
         $this->assertArrayHasKey('5m', UsageQuery::VALID_INTERVALS);
         $this->assertArrayHasKey('15m', UsageQuery::VALID_INTERVALS);
+        $this->assertArrayHasKey('30m', UsageQuery::VALID_INTERVALS);
         $this->assertArrayHasKey('1h', UsageQuery::VALID_INTERVALS);
         $this->assertArrayHasKey('1d', UsageQuery::VALID_INTERVALS);
         $this->assertArrayHasKey('1w', UsageQuery::VALID_INTERVALS);