Add additional indices to StaticGroupAssociation

[glennmatthews]

Closes #5472

What's Changed

Add indices to StaticGroupAssociation reflecting likely lookup/access patterns. While Django automatically adds indices for regular ForeignKeys, it does not do so for GenericForeignKeys, so we have to add our own. These are very similar to the indices we already have on the ObjectChange table.

Screenshots

Before:

nautobot=# \d extras_staticgroupassociation
                     Table "public.extras_staticgroupassociation"
          Column           |           Type           | Collation | Nullable | Default 
---------------------------+--------------------------+-----------+----------+---------
 id                        | uuid                     |           | not null | 
 created                   | timestamp with time zone |           |          | 
 last_updated              | timestamp with time zone |           |          | 
 _custom_field_data        | jsonb                    |           | not null | 
 associated_object_id      | uuid                     |           | not null | 
 associated_object_type_id | integer                  |           | not null | 
 static_group_id           | uuid                     |           | not null | 
Indexes:
    "extras_staticgroupassociation_pkey" PRIMARY KEY, btree (id)
    "extras_staticgroupassoci_static_group_id_associat_cb19851a_uniq" UNIQUE CONSTRAINT, btree (static_group_id, associated_object_type_id, associated_object_id)
    "extras_staticgroupassociat_associated_object_type_id_d3db04b2" btree (associated_object_type_id)
    "extras_staticgroupassociation_associated_object_id_81e97e16" btree (associated_object_id)
    "extras_staticgroupassociation_static_group_id_f85f6416" btree (static_group_id)
Foreign-key constraints:
    "extras_staticgroupas_associated_object_ty_d3db04b2_fk_django_co" FOREIGN KEY (associated_object_type_id) REFERENCES django_content_type(id) DEFERRABLE INITIALLY DEFERRED
    "extras_staticgroupas_static_group_id_f85f6416_fk_extras_st" FOREIGN KEY (static_group_id) REFERENCES extras_staticgroup(id) DEFERRABLE INITIALLY DEFERRED

After:

nautobot=# \d extras_staticgroupassociation
                     Table "public.extras_staticgroupassociation"
          Column           |           Type           | Collation | Nullable | Default 
---------------------------+--------------------------+-----------+----------+---------
 id                        | uuid                     |           | not null | 
 created                   | timestamp with time zone |           |          | 
 last_updated              | timestamp with time zone |           |          | 
 _custom_field_data        | jsonb                    |           | not null | 
 associated_object_id      | uuid                     |           | not null | 
 associated_object_type_id | integer                  |           | not null | 
 static_group_id           | uuid                     |           | not null | 
Indexes:
    "extras_staticgroupassociation_pkey" PRIMARY KEY, btree (id)
    "extras_sga_associated_object" btree (associated_object_type_id, associated_object_id)
    "extras_sga_double" btree (static_group_id, associated_object_id)
    "extras_staticgroupassoci_static_group_id_associat_cb19851a_uniq" UNIQUE CONSTRAINT, btree (static_group_id, associated_object_type_id, associated_object_id)
    "extras_staticgroupassociat_associated_object_type_id_d3db04b2" btree (associated_object_type_id)
    "extras_staticgroupassociation_associated_object_id_81e97e16" btree (associated_object_id)
    "extras_staticgroupassociation_static_group_id_f85f6416" btree (static_group_id)
Foreign-key constraints:
    "extras_staticgroupas_associated_object_ty_d3db04b2_fk_django_co" FOREIGN KEY (associated_object_type_id) REFERENCES django_content_type(id) DEFERRABLE INITIALLY DEFERRED
    "extras_staticgroupas_static_group_id_f85f6416_fk_extras_st" FOREIGN KEY (static_group_id) REFERENCES extras_staticgroup(id) DEFERRABLE INITIALLY DEFERRED

Also:

>>> print(Tag.objects.get(name="Amber").static_groups.query.explain(using="default"))
Sort  (cost=12.59..12.59 rows=1 width=184)
  Sort Key: extras_staticgroup.name
  ->  Hash Join  (cost=8.30..12.58 rows=1 width=184)
        Hash Cond: (extras_staticgroup.id = u0.static_group_id)
        ->  Seq Scan on extras_staticgroup  (cost=0.00..4.00 rows=100 width=184)
        ->  Hash  (cost=8.29..8.29 rows=1 width=16)
              ->  Index Scan using extras_sga_associated_object on extras_staticgroupassociation u0  (cost=0.27..8.29 rows=1 width=16)
                    Index Cond: ((associated_object_type_id = 85) AND (associated_object_id = '662d8948-08a6-4ba1-ace8-242f87f8ab22'::uuid))

TODO

• Explanation of Change(s)
• Added change log fragment(s) (for more information see the documentation)
• Attached Screenshots, Payload Example
• n/a Unit, Integration Tests
• n/a Documentation Updates (when adding/changing features)
• n/a Example App Updates (when adding/changing features)
• Outline Remaining Work, Constraints from Design