feat(users): add google oauth login flow

apps/users/api/throttles.py

@@ -83,6 +83,35 @@ class ScopedMobileThrottle(SimpleRateThrottle):
         return allowed
 
 
+class ScopedFlowMobileThrottle(ScopedMobileThrottle):
+    def get_mobile_identifier(self, request) -> str | None:
+        mobile = super().get_mobile_identifier(request)
+        if mobile:
+            return mobile
+
+        try:
+            flow = request.data.get("flow")
+        except Exception:
+            flow = None
+
+        if not isinstance(flow, str) or not flow:
+            return None
+
+        try:
+            from apps.users.services.google_oauth import get_google_flow
+
+            flow_payload = get_google_flow(flow)
+        except Exception:
+            return None
+
+        mobile = flow_payload.get("mobile")
+        if not isinstance(mobile, str):
+            return None
+
+        normalized = "".join(ch for ch in mobile if ch.isdigit())
+        return normalized or None
+
+
 class OTPSendBurstThrottle(ScopedMobileThrottle):
     scope = "otp_send_burst"
 
@@ -97,3 +126,15 @@ class PasswordLoginThrottle(ScopedMobileThrottle):
 
 class OTPLoginThrottle(ScopedMobileThrottle):
     scope = "login_otp"
+
+
+class GoogleClaimSendBurstThrottle(ScopedFlowMobileThrottle):
+    scope = "otp_send_burst"
+
+
+class GoogleClaimSendSustainedThrottle(ScopedFlowMobileThrottle):
+    scope = "otp_send_sustained"
+
+
+class GoogleClaimVerifyThrottle(ScopedFlowMobileThrottle):
+    scope = "login_otp"