fix(history): address PR #116 review feedback

- console: drop orphaned `Chat logging (/logging chat)` lines from
  cons_logging_setting() and cons_privacy_setting() — the /logging chat
  subcommand was removed, PREF_CHLOG now tracks PREF_HISTORY implicitly
- command: deprecate /logging command. It now prints a single notice
  pointing to /history; CMD_PREAMBLE trimmed (min_args=0, no
  setting_func, syntax/args/examples dropped); subcommand 'group'
  removed from autocomplete
- sqlite: gate LMC merge in _sqlite_get_previous_chat() on
  PREF_CORRECTION_ALLOW. When /correction is off, return original and
  correction rows as separate messages instead of merging via
  COALESCE/LEFT JOIN — matches the flatfile load path and the PR's
  stated semantics for /correction off

src/database_sqlite.c

@@ -392,8 +392,8 @@ _sqlite_get_previous_chat(const gchar* const contact_barejid, const gchar* start
     const gboolean lmc_allowed = prefs_get_boolean(PREF_CORRECTION_ALLOW);
     const char* msg_expr = lmc_allowed ? "COALESCE(B.`message`, A.`message`)" : "A.`message`";
     const char* join_clause = lmc_allowed
-        ? "LEFT JOIN `ChatLogs` AS B ON (A.`replaced_by_db_id` = B.`id` AND A.`from_jid` = B.`from_jid`) "
-        : "";
+                                  ? "LEFT JOIN `ChatLogs` AS B ON (A.`replaced_by_db_id` = B.`id` AND A.`from_jid` = B.`from_jid`) "
+                                  : "";
     const char* replaces_filter = lmc_allowed ? "(A.`replaces_db_id` IS NULL) AND " : "";
 
     auto_sqlite gchar* query = sqlite3_mprintf("SELECT * FROM ("