Fix client debugscript not buffering startup logs

[MohabCodeX]

PR #4323 caused early outputDebugString calls and startup logs to get discarded before /debugscript is opened, because players start with debug level 0. This restores log buffering while on debugscript 0 so running /debugscript 3 later still shows past history.

Thanks to @rxyyy for catching and reporting this regression.

Note on Debug builds: Debug builds (MTA_DEBUG) will still not buffer startup logs while the debug window is closed due to this check:

mtasa-blue/Client/mods/deathmatch/logic/CScriptDebugging.cpp

Lines 133 to 136 in b0d128a

	#ifdef MTA_DEBUG
	if (!g_pCore->IsDebugVisible())
	return;
	#endif

I kept that untouched to keep this PR strictly minimal, but the issue is completely fixed for standard Release builds.

Testing

1. On debugscript 0, run crun outputDebugString("buffered log", 3).
2. Run debugscript 3 -> log should appear in the console.
3. Switch to debugscript 1:
   • crun outputDebugString("test warn", 2) -> filtered out.
   • crun outputDebugString("test err", 1) -> displayed in red.