refactor: dont store ap pids in posts:pid

new zset postsRemote:pid
in topic purge only make 1 db call to reduce counters

src/posts/create.js

@@ -59,10 +59,10 @@ module.exports = function (Posts) {
 
 		const topicData = await topics.getTopicFields(tid, ['cid', 'pinned']);
 		postData.cid = topicData.cid;
-
+		const isRemote = !utils.isNumber(pid);
 		await Promise.all([
-			db.sortedSetAdd('posts:pid', timestamp, postData.pid),
-			utils.isNumber(pid) ? db.incrObjectField('global', 'postCount') : null,
+			db.sortedSetAdd(!isRemote ? 'posts:pid' : 'postsRemote:pid', timestamp, postData.pid),
+			!isRemote ? db.incrObjectField('global', 'postCount') : null,
 			user.onNewPostMade(postData),
 			topics.onNewPostMade(postData),
 			categories.onNewPostMade(topicData.cid, topicData.pinned, postData),

src/posts/delete.js

@@ -79,7 +79,9 @@ module.exports = function (Posts) {
 			deleteFromGroups(pids),
 			deleteDiffs(pids),
 			deleteFromUploads(pids),
-			db.sortedSetsRemove(['posts:pid', 'posts:votes', 'posts:flagged'], pids),
+			db.sortedSetsRemove([
+				'posts:pid', 'posts:votes', 'posts:flagged', 'postsRemote:pid',
+			], pids),
 			Posts.attachments.empty(pids),
 			activitypub.notes.delete(pids),
 			db.deleteAll(pids.map(pid => `pid:${pid}:editors`)),

src/posts/votes.js

@@ -260,7 +260,9 @@ module.exports = function (Posts) {
 		}
 		await Promise.all([
 			updateTopicVoteCount(postData),
-			db.sortedSetAdd('posts:votes', postData.votes, postData.pid),
+			utils.isNumber(postData.pid) ?
+				db.sortedSetAdd('posts:votes', postData.votes, postData.pid) :
+				null,
 			Posts.setPostFields(postData.pid, {
 				upvotes: postData.upvotes,
 				downvotes: postData.downvotes,