directory-service: fix slow postgresql queries (#6639)

* add analysis

* implement p1.1 and p1.2

* Update apps/simplex-directory-service/src/Directory/Service.hs

Co-authored-by: Evgeny <evgeny@poberezkin.com>

* update plans

* remove plans

---------

Co-authored-by: Evgeny <evgeny@poberezkin.com>

src/Simplex/Chat/Store/SQLite/Migrations/agent_query_plans.txt

@@ -1197,6 +1197,10 @@ Query: UPDATE connections SET smp_agent_version = ? WHERE conn_id = ?
 Plan:
 SEARCH connections USING PRIMARY KEY (conn_id=?)
 
+Query: UPDATE deleted_snd_chunk_replicas SET delay = ?, retries = retries + 1, updated_at = ? WHERE deleted_snd_chunk_replica_id = ?
+Plan:
+SEARCH deleted_snd_chunk_replicas USING INTEGER PRIMARY KEY (rowid=?)
+
 Query: UPDATE messages SET msg_body = x'' WHERE conn_id = ? AND internal_id = ?
 Plan:
 SEARCH messages USING PRIMARY KEY (conn_id=? AND internal_id=?)

src/Simplex/Chat/Store/SQLite/Migrations/chat_query_plans.txt

@@ -1430,14 +1430,6 @@ Plan:
 SEARCH g USING INTEGER PRIMARY KEY (rowid=?)
 SEARCH i USING INTEGER PRIMARY KEY (rowid=?)
 
-Query: 
-          SELECT member_status
-          FROM group_members
-          WHERE group_id = ? AND user_id = ?
-        
-Plan:
-SEARCH group_members USING INDEX idx_group_members_group_id (user_id=? AND group_id=?)
-
 Query: 
           SELECT r.file_id
           FROM rcv_files r