Production hardening: REAPER all-in-one launcher, rdpthread UX, logic fixes

- Add REAPER.bat single entry (pip, dirs, smoke test, launch); MASTER/MASTERSTER shim to it
- bruteforce: rdpthread helpers, safe writer close, spray_all_hosts incremental writes, progress
- gui: credential banner, spray messaging without spam; cmdkey TERMSRV host
- scanner: adaptive progress; proxy: retry cap on open_connection
- ip_utils: /32 CIDR, count_ips aligned with large dash ranges
- README/install/run: deployment docs and REAPER.bat references

Co-authored-by: Cursor <cursoragent@cursor.com>

scanner.py

@@ -119,6 +119,16 @@ async def scan_ips(
 
     checker = check_rdp_with_banner if banner_check else check_rdp_port
 
+    if progress_callback and total > 0:
+        if total <= 1000:
+            progress_every = max(1, total // 50 or 1)
+        elif total <= 10000:
+            progress_every = 100
+        else:
+            progress_every = 1000
+    else:
+        progress_every = 0
+
     async def check_one(ip: str, port: int):
         nonlocal checked
         async with sem:
@@ -130,10 +140,11 @@ async def scan_ips(
                 if live_callback:
                     live_callback(ip, p)
             checked += 1
-            if progress_callback and checked % 1000 == 0:
-                elapsed = time.time() - start_time
-                rate = checked / elapsed if elapsed > 0 else 0
-                progress_callback(checked, total, len(live_hosts), rate)
+            if progress_callback and progress_every:
+                if checked == total or checked % progress_every == 0:
+                    elapsed = time.time() - start_time
+                    rate = checked / elapsed if elapsed > 0 else 0
+                    progress_callback(checked, total, len(live_hosts), rate)
 
     # Fire all tasks concurrently
     tasks = []