chore(flagd): Improve grpc logging (#1219)

Signed-off-by: christian.lutnik <[email protected]>

Author: chrfwow

providers/flagd/src/main/java/dev/openfeature/contrib/providers/flagd/resolver/common/ChannelMonitor.java

@@ -48,7 +48,7 @@ public static void monitorChannelState(
                 }
             }
             if (currentState != ConnectivityState.SHUTDOWN) {
-                log.debug("shutting down grpc channel");
+                log.debug("continuing to monitor the grpc channel");
                 // Re-register the state monitor to watch for the next state transition.
                 monitorChannelState(currentState, channel, onConnectionReady, onConnectionLost);
             }

providers/flagd/src/main/java/dev/openfeature/contrib/providers/flagd/resolver/process/storage/connector/grpc/GrpcStreamConnector.java

@@ -116,6 +116,7 @@ void observeEventStream(final BlockingQueue<QueuePayload> writeTo, final AtomicB
                     // instead of logging and throwing here, retain the exception and handle in the
                     // stream logic below
                     metadataException = e;
+                    log.debug("Metadata exception: {}", e.getMessage(), e);
                 }
 
                 while (!shutdown.get()) {
@@ -129,7 +130,10 @@ void observeEventStream(final BlockingQueue<QueuePayload> writeTo, final AtomicB
 
                     Throwable streamException = response.getError();
                     if (streamException != null || metadataException != null) {
-                        log.debug("Exception in GRPC connection");
+                        log.debug(
+                                "Exception in GRPC connection, streamException {}, metadataException {}",
+                                streamException,
+                                metadataException);
                         if (!writeTo.offer(new QueuePayload(
                                 QueuePayloadType.ERROR, "Error from stream or metadata", metadataResponse))) {
                             log.error("Failed to convey ERROR status, queue is full");