client and project in single query

internal/query/embed/introspection_client_by_id.sql

@@ -0,0 +1,24 @@
+with config as (
+		select app_id, client_id, client_secret
+		from projections.apps5_api_configs
+		where instance_id = $1
+			and client_id = $2
+	union
+		select app_id, client_id, client_secret
+		from projections.apps5_oidc_configs
+		where instance_id = $1
+			and client_id = $2
+),
+keys as (
+	select identifier as client_id, json_object_agg(id, public_key) as public_keys
+	from projections.authn_keys2
+	where $3 = true -- when argument is false, don't waste time on trying to query for keys.
+		and instance_id = $1
+		and identifier = $2
+		and expiration > current_timestamp
+	group by identifier
+)
+select apps.project_id, config.client_secret, keys.public_keys from config
+join projections.apps5 apps on apps.id = config.app_id
+left join keys on keys.client_id = config.client_id
+where apps.owner_removed = false;