misc: various clean up for diagnosing launch failures (#872)

## Link to GitHub Issue or related Pull Request, if one exists
#345 

## Description of change

**IIDX TDJ rom probe no longer touches removable media** —
`C:\000rom.txt` and `D:\001rom.txt` are not emulated paths; they hit
whatever is actually mounted on the user's machine. `D:` is commonly an
optical drive or card reader, and the launcher clears
`SEM_FAILCRITICALERRORS` process-wide before attach, so an empty drive
raises the modal *"insert a disk"* dialog and blocks the attaching
thread. The probe now checks `GetDriveTypeW` and only reads fixed and
RAM disks.

**`iat_find` no longer calls `log_fatal` on an unparseable module** —
`iat_try(nullptr)` walks every loaded module, including foreign ones
(injected, manually mapped, header wiped by AV/EDR/overlays). A non-`MZ`
DOS header called `log_fatal`. There is nothing to hook in such a
module, so it is skipped.

**`logger::stop()` can no longer hang forever** — hook installation
suspends every other thread, including the logging thread. `stop()`
unconditionally joined that thread, so `log_fatal` and the 30-second
`show_popup` watchdog both wedged instead of terminating, and logging is
asynchronous so nothing reached log.txt either. It now waits with a
timeout, then detaches and flushes synchronously.

**`GetFileSizeEx` was never hooked** — the hook was registered under the
name `"GetFileSize"`, so it re-patched that slot instead.

**Warn when `-modules` is set** — it changes where the game is run from,
and is usually set accidentally.

## Testing
*how was the code tested?*

src/spice2x/games/iidx/iidx.cpp

@@ -279,6 +279,26 @@ namespace games::iidx {
         return nullptr;
     }
 
+    // best-effort read of a TDJ ROM file to determine if the game is running in TDJ mode
+    //
+    // these paths are not emulated - they hit whatever is actually mounted at that drive letter.
+    // an empty optical or removable drive raises the modal "insert a disk" error (the launcher
+    // clears SEM_FAILCRITICALERRORS process-wide) and a downed network drive stalls on redirector
+    // timeouts, so only probe what a TDJ cabinet would actually be laid out on.
+    // drive_path must be absolute and start with a drive letter.
+    static bool tdj_rom_matches(const char *drive_path, const char *expected) {
+        const wchar_t root[] = { (wchar_t) drive_path[0], L':', L'\\', L'\0' };
+        const auto drive_type = GetDriveTypeW(root);
+
+        if (drive_type != DRIVE_FIXED && drive_type != DRIVE_RAMDISK) {
+            log_misc("iidx", "not probing '{}' for TDJ, not a local disk (drive type {})",
+                    drive_path, drive_type);
+            return false;
+        }
+
+        return fileutils::text_read(drive_path) == expected;
+    }
+
 #endif
 
     IIDXGame::IIDXGame() : Game("Beatmania IIDX") {
@@ -339,8 +359,10 @@ namespace games::iidx {
             HAS_LIBAIO = true;
 
             // check TDJ mode
-            TDJ_MODE |= fileutils::text_read("C:\\000rom.txt") == "TDJ-JA";
-            TDJ_MODE |= fileutils::text_read("D:\\001rom.txt") == "TDJ";
+            if (!TDJ_MODE) {
+                TDJ_MODE = tdj_rom_matches("C:\\000rom.txt", "TDJ-JA")
+                        || tdj_rom_matches("D:\\001rom.txt", "TDJ");
+            }
 
             // force TDJ mode
             if (TDJ_MODE) {