move public.blocks PK application into own migration to be applied alone

db/post_batch_processing_migrations/00016_create_ipld_pk_constraint.sql

@@ -0,0 +1,7 @@
+-- +goose Up
+ALTER TABLE public.blocks
+ADD CONSTRAINT pk_public_blocks PRIMARY KEY (key);
+
+-- +goose Down
+ALTER TABLE public.blocks
+DROP CONSTRAINT pk_public_blocks;

db/post_batch_processing_migrations/00017_create_pk_constraints.sql

@@ -1,7 +1,4 @@
 -- +goose Up
-ALTER TABLE public.blocks
-ADD CONSTRAINT pk_public_blocks PRIMARY KEY (key);
-
 ALTER TABLE public.nodes
 ADD CONSTRAINT pk_public_nodes PRIMARY KEY (node_id);
 
@@ -33,9 +30,6 @@ ALTER TABLE eth.state_accounts
 ADD CONSTRAINT pk_eth_state_accounts PRIMARY KEY (header_id, state_path);
 
 -- +goose Down
-ALTER TABLE public.blocks
-DROP CONSTRAINT pk_public_blocks;
-
 ALTER TABLE public.nodes
 DROP CONSTRAINT pk_public_nodes;