Task: in_loop, at_close, fields, tipo check, task_results, close_task_ids, rate limit login-pin (#53 #54 #55 #59)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/backend/api/middleware/rate_limit.py

@@ -35,6 +35,8 @@ class RateLimitMiddleware(BaseHTTPMiddleware):
     """
 
     LOGIN_PATH = "/api/auth/login"
+    # #59: il login con PIN e' lo stesso attacco (4 cifre: ancora piu' facile da indovinare)
+    LOGIN_PIN_PATH = "/api/auth/login-pin"
     WINDOW_SECONDS = 60
 
     # Paths that carry a supervisor's (capoturno) credentials in the request
@@ -97,7 +99,7 @@ class RateLimitMiddleware(BaseHTTPMiddleware):
             return True
         if method != "POST":
             return False
-        if path == cls.LOGIN_PATH:
+        if path in (cls.LOGIN_PATH, cls.LOGIN_PIN_PATH):
             return True
         return any(p.match(path) for p in cls._SUPERVISOR_CREDENTIAL_PATTERNS)