remove redundant indices

[freben]

This is on top of #27341

The time has come to remove these indices, that are lingering around for historical reasons. At this point people should have had enough time to migrate after #22594 to have that deferred index into place.

Ping @drodil and @Rugvip here too.

For reference, here follows a dump of indices on a postgres installation before the PR:

final_entities:

index	query
entity_ref_idx	CREATE INDEX entity_ref_idx ON public.final_entities USING btree (entity_ref)
final_entities_entity_id_idx	CREATE INDEX final_entities_entity_id_idx ON public.final_entities USING btree (entity_id)
final_entities_pkey	CREATE UNIQUE INDEX final_entities_pkey ON public.final_entities USING btree (entity_id)

refresh_state:

index	query
refresh_state_entity_id_idx	CREATE INDEX refresh_state_entity_id_idx ON public.refresh_state USING btree (entity_id)
refresh_state_entity_ref_idx	CREATE INDEX refresh_state_entity_ref_idx ON public.refresh_state USING btree (entity_ref)
refresh_state_entity_ref_uniq	CREATE UNIQUE INDEX refresh_state_entity_ref_uniq ON public.refresh_state USING btree (entity_ref)
refresh_state_next_stitch_at_idx	CREATE INDEX refresh_state_next_stitch_at_idx ON public.refresh_state USING btree (next_stitch_at) WHERE (next_stitch_at IS NOT NULL)
refresh_state_next_update_at_idx	CREATE INDEX refresh_state_next_update_at_idx ON public.refresh_state USING btree (next_update_at)
refresh_state_pkey	CREATE UNIQUE INDEX refresh_state_pkey ON public.refresh_state USING btree (entity_id)

search:

index	query
search_entity_id_idx	CREATE INDEX search_entity_id_idx ON public.search USING btree (entity_id)
search_key_idx	CREATE INDEX search_key_idx ON public.search USING btree (key)
search_key_original_value_idx	CREATE INDEX search_key_original_value_idx ON public.search USING btree (key, original_value)
search_key_value_idx	CREATE INDEX search_key_value_idx ON public.search USING btree (key, value)
search_value_idx	CREATE INDEX search_value_idx ON public.search USING btree (value)

refresh_state_references:

index	query
refresh_state_references_pkey	CREATE UNIQUE INDEX refresh_state_references_pkey ON public.refresh_state_references USING btree (id)
refresh_state_references_source_entity_ref_idx	CREATE INDEX refresh_state_references_source_entity_ref_idx ON public.refresh_state_references USING btree (source_entity_ref)
refresh_state_references_source_key_idx	CREATE INDEX refresh_state_references_source_key_idx ON public.refresh_state_references USING btree (source_key)
refresh_state_references_target_entity_ref_idx	CREATE INDEX refresh_state_references_target_entity_ref_idx ON public.refresh_state_references USING btree (target_entity_ref)

[github-actions]

Thank you for contributing to Backstage! The changes in this pull request will be part of the 1.33.0 release, scheduled for Tue, 19 Nov 2024.