Point of subscriptions

This is to collect all points with automatic subscriptions, to get an overview

| backend call | subscribes | opt out |
|---|---|---|
| get_accounts | yes | no |
| get_assets | yes | no |
| get_balance_objects | yes | no |
| get_full_accounts | yes | yes |
| get_key_references | yes | no |
| get_objects | yes | no |
| lookup_accounts | yes | no |

`bitsharesjs 1.8.3`

| function | subscribes | opt out |
|---|---|---|
| ChainStore.getAccount | yes | yes |

`bitsharesjs 1.9.X`

| function | subscribes | opt in |
|---|---|---|
| ChainStore.getAccount | no | yes |

Review the listed backend calls and the ChainStore.getAccount entries for bitsharesjs 1.8.3 and 1.9.X. Verify which operations automatically subscribe and whether they provide opt-out or opt-in behavior. Done means the subscription overview is complete and consistent across the listed versions.

Written by the indexing model from the issue text.