remove self-referential hashtag channel key seeding from DB

server.js

@@ -48,31 +48,7 @@ function computeContentHash(rawHex) {
 const db = require('./db');
 const pktStore = new PacketStore(db, config.packetStore || {}).load();
 const channelKeys = require("./config.json").channelKeys || {};
-
-// Auto-derive keys for hashtag channels: SHA256("#name") first 16 bytes
-// Any channel starting with # can be decrypted algorithmically
-function deriveHashtagKey(name) {
-  return crypto.createHash('sha256').update(name).digest('hex').substring(0, 32);
-}
-// Seed with known hashtag channels from already-decrypted data
-const knownHashtags = new Set();
-try {
-  const rows = db.db.prepare("SELECT DISTINCT json_extract(decoded_json, '$.channel') as ch FROM packets WHERE json_extract(decoded_json, '$.type') = 'CHAN'").all();
-  for (const r of rows) {
-    if (r.ch && r.ch.startsWith('#')) knownHashtags.add(r.ch);
-  }
-} catch {}
-// Add any hashtag keys from config that we might not have seen yet
-for (const name of Object.keys(channelKeys)) {
-  if (name.startsWith('#')) knownHashtags.add(name);
-}
-// Derive and add keys for all known hashtags
-for (const name of knownHashtags) {
-  if (!channelKeys[name]) {
-    channelKeys[name] = deriveHashtagKey(name);
-  }
-}
-console.log(`[channels] ${Object.keys(channelKeys).length} channel keys (${knownHashtags.size} auto-derived hashtags)`);
+console.log(`[channels] ${Object.keys(channelKeys).length} channel key(s) configured`);
 
 // --- Cache TTL config (seconds → ms) ---
 const _ttlCfg = config.cacheTTL || {};