chore(clickhouse): add projection for events table

packages/clickhouse/migrations/20260413080000_add_sandbox_events_team_projection.sql

@@ -0,0 +1,29 @@
+-- +goose Up
+-- TEMPORARY: Add a projection ordered by (sandbox_team_id, timestamp)
+-- so that queries filtering by sandbox_team_id can skip the full table scan.
+-- The base ORDER BY is (sandbox_id, timestamp) which doesn't help when only
+-- sandbox_team_id is provided.
+-- This projection should be removed once we migrate the table's ORDER BY to
+-- (sandbox_team_id, timestamp, sandbox_id) via a CREATE + RENAME swap.
+-- Also drops the now-redundant bloom_filter index on sandbox_team_id since
+-- the projection's primary index covers that filtering.
+ALTER TABLE sandbox_events_local
+    ADD PROJECTION IF NOT EXISTS proj_team_id (
+        SELECT * ORDER BY sandbox_team_id, timestamp
+    );
+
+ALTER TABLE sandbox_events_local
+    MATERIALIZE PROJECTION proj_team_id;
+
+ALTER TABLE sandbox_events_local
+    DROP INDEX IF EXISTS idx_team_id;
+
+-- +goose Down
+ALTER TABLE sandbox_events_local
+    ADD INDEX IF NOT EXISTS idx_team_id sandbox_team_id TYPE bloom_filter(0.01) GRANULARITY 1;
+
+ALTER TABLE sandbox_events_local
+    MATERIALIZE INDEX idx_team_id;
+
+ALTER TABLE sandbox_events_local
+    DROP PROJECTION IF EXISTS proj_team_id;