chore: move the go code into a subfolder

apps/api/cmd/setup/40/02_func.sql

@@ -0,0 +1,92 @@
+CREATE OR REPLACE FUNCTION eventstore.latest_aggregate_state(
+    instance_id TEXT
+    , aggregate_type TEXT
+    , aggregate_id TEXT
+    
+    , sequence OUT BIGINT
+    , owner OUT TEXT
+)
+    LANGUAGE 'plpgsql'
+    STABLE PARALLEL SAFE
+AS $$
+    BEGIN
+        SELECT
+            COALESCE(e.sequence, 0) AS sequence
+            , e.owner
+        INTO
+            sequence
+            , owner
+        FROM
+            eventstore.events2 e
+        WHERE
+            e.instance_id = $1
+            AND e.aggregate_type = $2
+            AND e.aggregate_id = $3
+        ORDER BY 
+            e.sequence DESC
+        LIMIT 1;
+
+        RETURN;
+    END;
+$$;
+
+CREATE OR REPLACE FUNCTION eventstore.commands_to_events(commands eventstore.command[])
+    RETURNS SETOF eventstore.events2 
+    LANGUAGE 'plpgsql'
+    STABLE PARALLEL SAFE
+    ROWS 10
+AS $$
+DECLARE
+    "aggregate" RECORD;
+    current_sequence BIGINT;
+    current_owner TEXT;
+BEGIN
+    FOR "aggregate" IN 
+        SELECT DISTINCT
+            instance_id
+            , aggregate_type
+            , aggregate_id
+        FROM UNNEST(commands)
+    LOOP
+        SELECT 
+            * 
+        INTO
+            current_sequence
+            , current_owner 
+        FROM eventstore.latest_aggregate_state(
+            "aggregate".instance_id
+            , "aggregate".aggregate_type
+            , "aggregate".aggregate_id
+        );
+
+        RETURN QUERY
+        SELECT
+            c.instance_id
+            , c.aggregate_type
+            , c.aggregate_id
+            , c.command_type -- AS event_type
+            , COALESCE(current_sequence, 0) + ROW_NUMBER() OVER () -- AS sequence
+            , c.revision
+            , NOW() -- AS created_at
+            , c.payload
+            , c.creator
+            , COALESCE(current_owner, c.owner) -- AS owner
+            , EXTRACT(EPOCH FROM NOW()) -- AS position
+            , c.ordinality::{{ .InTxOrderType }} -- AS in_tx_order
+        FROM
+            UNNEST(commands) WITH ORDINALITY AS c
+        WHERE
+            c.instance_id = aggregate.instance_id
+            AND c.aggregate_type = aggregate.aggregate_type
+            AND c.aggregate_id = aggregate.aggregate_id;
+    END LOOP;
+    RETURN;
+END;
+$$;
+
+CREATE OR REPLACE FUNCTION eventstore.push(commands eventstore.command[]) RETURNS SETOF eventstore.events2 VOLATILE AS $$
+INSERT INTO eventstore.events2
+SELECT * FROM eventstore.commands_to_events(commands)
+ORDER BY in_tx_order
+RETURNING *
+$$ LANGUAGE SQL;