make db fks deferrable so that we can commit entire cid payload in single transaction; adjust buffer sizes to optimize performane and stability

db/migrations/00029_create_transaction_cids_table.sql

@@ -1,7 +1,7 @@
 -- +goose Up
 CREATE TABLE public.transaction_cids (
   id                    SERIAL PRIMARY KEY,
-  header_id             INTEGER NOT NULL REFERENCES header_cids (id) ON DELETE CASCADE,
+  header_id             INTEGER NOT NULL REFERENCES header_cids (id) ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED,
   tx_hash               VARCHAR(66) NOT NULL,
   cid                   TEXT NOT NULL,
   dst                   VARCHAR(66) NOT NULL,

db/migrations/00030_create_receipt_cids_table.sql

@@ -1,7 +1,7 @@
 -- +goose Up
 CREATE TABLE public.receipt_cids (
   id                    SERIAL PRIMARY KEY,
-  tx_id                 INTEGER NOT NULL REFERENCES transaction_cids (id) ON DELETE CASCADE,
+  tx_id                 INTEGER NOT NULL REFERENCES transaction_cids (id) ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED,
   cid                   TEXT NOT NULL,
   topic0s               VARCHAR(66)[]
 );

db/migrations/00031_create_state_cids_table.sql

@@ -1,7 +1,7 @@
 -- +goose Up
 CREATE TABLE public.state_cids (
   id                    SERIAL PRIMARY KEY,
-  header_id             INTEGER NOT NULL REFERENCES header_cids (id) ON DELETE CASCADE,
+  header_id             INTEGER NOT NULL REFERENCES header_cids (id) ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED,
   state_key             VARCHAR(66) NOT NULL,
   leaf                  BOOLEAN NOT NULL,
   cid                   TEXT NOT NULL,

db/migrations/00032_create_storage_cids_table.sql

@@ -1,7 +1,7 @@
 -- +goose Up
 CREATE TABLE public.storage_cids (
   id                    SERIAL PRIMARY KEY,
-  state_id              INTEGER NOT NULL REFERENCES state_cids (id) ON DELETE CASCADE,
+  state_id              INTEGER NOT NULL REFERENCES state_cids (id) ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED,
   storage_key           VARCHAR(66) NOT NULL,
   leaf                  BOOLEAN NOT NULL,
   cid                   TEXT NOT NULL,