chore: redo and clean all indexes on attributes instances tables (#1222)

search-service/src/main/resources/db/migration/V0_42__fix_indexes_in_hypertables.sql

@@ -0,0 +1,20 @@
+-- Default indexes created by Timescale that should not have been removed
+-- https://docs.timescale.com/use-timescale/latest/hypertables/about-hypertables/#hypertable-indexes
+CREATE INDEX IF NOT EXISTS attribute_instance_time_idx
+    ON attribute_instance(time DESC );
+CREATE INDEX IF NOT EXISTS attribute_instance_audit_time_idx
+    ON attribute_instance_audit(time DESC);
+
+-- Indexes on main keys used when doing a temporal query
+-- As recommended in https://docs.timescale.com/getting-started/latest/create-hypertable/#creating-your-first-hypertable
+CREATE INDEX attribute_instance_tea_idx
+    ON attribute_instance(temporal_entity_attribute, time DESC);
+CREATE INDEX attribute_instance_audit_tea_timeproperty_idx
+    ON attribute_instance_audit(temporal_entity_attribute, time_property, time DESC);
+
+-- Remove current unwanted indexes
+DROP INDEX IF EXISTS attribute_instance_audit_tea_time_property_idx;
+DROP INDEX IF EXISTS attribute_instance_temporal_entity_attribute_idx;
+
+-- Same as attribute_instance_time_idx created above, but with a deprecated reference to observed_at column
+DROP INDEX IF EXISTS attribute_instance_observed_at_idx;