Fix EQNotify add-tag option description exceeding Discord 100-char limit (#267)

The add-tag option description introduced in #266 was 108 characters, over
Discord's 100-character cap for option descriptions. discord.js validates
this only at command-registration time, so it passed tsc/tests but crashed
the bot on boot ("ExpectedConstraintError: Invalid string length"). Shortened
to 93 characters and noted the limit inline.


Claude-Session: https://claude.ai/code/session_01BWXRmPbtEz35wquwFd8Cu7

Co-authored-by: Claude <noreply@anthropic.com>

Author: ebm5025

src/features/eqnotify/commands/add-tag-subcommand.ts

@@ -23,8 +23,9 @@ class AddTagSubcommand extends Subcommand {
     return super.command.addStringOption((o) =>
       o
         .setName(Option.Tag)
+        // Discord limits option descriptions to 100 characters; keep it short.
         .setDescription(
-          "Keyword to match at the start of a batphone word (e.g. 'doze' hits 'Dozekar'). Use 'all' for every batphone."
+          "Keyword matched at the start of a batphone word (e.g. 'doze' hits Dozekar). 'all' = every BP."
         )
         .setRequired(true)
     );