Add very basic crawl job

Loops through feeds and adds items from each feed.

migrations/20230507201612_initial.sql

@@ -10,6 +10,8 @@ CREATE TABLE IF NOT EXISTS "feeds" (
     "updated_at" timestamp(3) NOT NULL,
     "deleted_at" timestamp(3)
 );
+CREATE INDEX "feeds_deleted_at" ON "feeds" ("deleted_at");
+CREATE UNIQUE INDEX "feeds_url" ON "feeds" ("url");
 
 CREATE TABLE IF NOT EXISTS "items" (
     "id" SERIAL PRIMARY KEY NOT NULL,
@@ -21,3 +23,5 @@ CREATE TABLE IF NOT EXISTS "items" (
     "updated_at" timestamp(3) NOT NULL,
     "deleted_at" timestamp(3)
 );
+CREATE INDEX "items_deleted_at" ON "items" ("deleted_at");
+CREATE UNIQUE INDEX "items_url_and_feed_id" ON "items" ("url", "feed_id");