[Metrics] Fixed incorrect key values for metrics in darwin (project-chip#34271)

open pairing window metrics was not capturing the metric inside the block

Author: anush-apple

src/darwin/Framework/CHIP/MTRDeviceController.mm

@@ -1113,7 +1113,7 @@ - (NSData * _Nullable)attestationChallengeForDeviceID:(NSNumber *)deviceID
         chip::CommissioneeDeviceProxy * deviceProxy;
 
         auto errorCode = CHIP_NO_ERROR;
-        MATTER_LOG_METRIC_SCOPE(kMetricPASEVerifierForSetupCode, errorCode);
+        MATTER_LOG_METRIC_SCOPE(kMetricAttestationChallengeForDevice, errorCode);
 
         errorCode = self->_cppCommissioner->GetDeviceBeingCommissioned([deviceID unsignedLongLongValue], &deviceProxy);
         VerifyOrReturnValue(![MTRDeviceController checkForError:errorCode logMsg:kErrorGetCommissionee error:nil], nil);
@@ -1885,10 +1885,10 @@ - (BOOL)openPairingWindow:(uint64_t)deviceID duration:(NSUInteger)duration error
         return NO;
     }
 
-    __block CHIP_ERROR errorCode = CHIP_NO_ERROR;
-    MATTER_LOG_METRIC_SCOPE(kMetricOpenPairingWindow, errorCode);
-
     auto block = ^BOOL {
+        CHIP_ERROR errorCode = CHIP_NO_ERROR;
+        MATTER_LOG_METRIC_SCOPE(kMetricOpenPairingWindow, errorCode);
+
         errorCode = chip::Controller::AutoCommissioningWindowOpener::OpenBasicCommissioningWindow(
             self->_cppCommissioner, deviceID, chip::System::Clock::Seconds16(static_cast<uint16_t>(duration)));
         return ![MTRDeviceController checkForError:errorCode logMsg:kErrorOpenPairingWindow error:error];

src/darwin/Framework/CHIP/MTRMetricKeys.h

@@ -61,8 +61,11 @@ constexpr Tracing::MetricKey kMetricDeviceBeingCommissioned = "dwnfw_dev_being_c
 // Tracks the request to generate PASE verifier for a given setup code
 constexpr Tracing::MetricKey kMetricPASEVerifierForSetupCode = "dwnfw_pase_verifier_for_code";
 
+// Tracks the request to get attestation challenge for a device
+constexpr Tracing::MetricKey kMetricAttestationChallengeForDevice = "dwnfw_attestation_challenge_for_device";
+
 // Marks the request to open pairing window
-constexpr Tracing::MetricKey kMetricOpenPairingWindow = "dwnfw_pase_verifier_for_code";
+constexpr Tracing::MetricKey kMetricOpenPairingWindow = "dwnfw_open_pairing_window";
 
 // Device Vendor ID
 constexpr Tracing::MetricKey kMetricDeviceVendorID = "dwnfw_device_vendor_id";