fix: rerun hint points at node unlock and preserves dry-run mode

The launcher success footer previously told users to rerun
`node dexbot test` (or `node dexbot drystart` for dry runs).
The canonical restart entry point is now `node unlock`, which
takes `--dryrun` as a flag rather than a separate subcommand.

Changes:
- dexbot.ts: replace the per-mode command string with a single
  `node unlock` invocation; inject ` --dryrun` for dry runs so a
  `drystart` user is not silently downgraded to live mode on
  relaunch. Shorten the trailing clause to drop the redundant
  "to start it again" / "in dry-run mode" suffix.
- tests/test_dexbot_startup_output.ts: update the assertion to
  match the new hint text.

Author: froooze

dexbot.ts

@@ -363,15 +363,14 @@ function printStartLauncherHeader({ botName = null, dryRun = false } = {}) {
 }
 
 function printStartLauncherSuccess({ botName = null, dryRun = false } = {}) {
-    const command = dryRun ? 'drystart' : 'test';
-    const target = botName ? ` ${botName}` : '';
+    const dryrunFlag = dryRun ? ' --dryrun' : '';
     console.log();
     console.log('='.repeat(50));
     console.log(startupSuccess('DEXBot2 started successfully!'));
     if (botName) {
-        console.log(`If the bot stops, rerun \`node dexbot ${command}${target}\` to start it again.`);
+        console.log(`If the bot stops, rerun \`node unlock${dryrunFlag} ${botName}\`.`);
     } else {
-        console.log(`If the bots stop, rerun \`node dexbot ${command}\` to start them again.`);
+        console.log(`If the bots stop, rerun \`node unlock${dryrunFlag}\`.`);
     }
     console.log('='.repeat(50));
     console.log();

tests/test_dexbot_startup_output.ts

@@ -239,7 +239,7 @@ require('../dexbot');
         assert.ok(logs.includes('Number active bots: 1'), 'dexbot start should print the active bot count');
         assert.ok(logs.includes('Starting bot runtime...'), 'dexbot start should print the runtime transition');
         assert.ok(logs.includes('DEXBot2 started successfully!'), 'dexbot start should print a success footer');
-        assert.ok(logs.includes('If the bots stop, rerun `node dexbot test` to start them again.'), 'dexbot start should print the restart hint');
+        assert.ok(logs.includes('If the bots stop, rerun `node unlock`.'), 'dexbot start should print the restart hint');
         assert.deepStrictEqual(logs.filter((line) => line.startsWith('┌') || line.startsWith('│') || line.startsWith('├') || line.startsWith('└')), [], 'dexbot start should not emit PM2-style tables');
         assert.ok(!logs.some((line) => line.includes('Connecting to BitShares...')), 'dexbot start should not print a separate connection banner');
         assert.ok(!logs.some((line) => line.includes('Authenticating master password...')), 'dexbot start should not print an auth banner');