Bound payload.bytes prints by payload.size (#11032)

decoded.payload.bytes is a 233-byte protobuf field that is not NUL-terminated.
Printing it with a plain "%s" reads until a NUL, which for a full-length payload
with no NUL runs past the field. Use "%.*s" with payload.size, matching the write
form already used a few lines up in SerialModule.

Live sites: RangeTestModule appendFile, SerialModule text output. The same fix is
applied to the commented-out debug lines in RangeTestModule and Router so the
pattern is consistent if they are re-enabled.

src/mesh/Router.cpp

@@ -753,7 +753,7 @@ meshtastic_Routing_Error perhapsEncode(meshtastic_MeshPacket *p)
 
             LOG_DEBUG("Original length - %d ", p->decoded.payload.size);
             LOG_DEBUG("Compressed length - %d ", compressed_len);
-            LOG_DEBUG("Original message - %s ", p->decoded.payload.bytes);
+            LOG_DEBUG("Original message - %.*s ", (int)p->decoded.payload.size, p->decoded.payload.bytes);
 
             // If the compressed length is greater than or equal to the original size, don't use the compressed form
             if (compressed_len >= p->decoded.payload.size) {

src/modules/RangeTestModule.cpp

@@ -154,7 +154,7 @@ ProcessMessage RangeTestModuleRadio::handleReceived(const meshtastic_MeshPacket
             NodeInfoLite *n = nodeDB->getMeshNode(getFrom(&mp));
 
             LOG_DEBUG("-----------------------------------------");
-            LOG_DEBUG("p.payload.bytes  \"%s\"", p.payload.bytes);
+            LOG_DEBUG("p.payload.bytes  \"%.*s\"", (int)p.payload.size, p.payload.bytes);
             LOG_DEBUG("p.payload.size   %d", p.payload.size);
             LOG_DEBUG("---- Received Packet:");
             LOG_DEBUG("mp.from          %d", mp.from);
@@ -192,7 +192,7 @@ bool RangeTestModuleRadio::appendFile(const meshtastic_MeshPacket &mp)
     meshtastic_NodeInfoLite *n = nodeDB->getMeshNode(getFrom(&mp));
     /*
         LOG_DEBUG("-----------------------------------------");
-        LOG_DEBUG("p.payload.bytes  \"%s\"", p.payload.bytes);
+        LOG_DEBUG("p.payload.bytes  \"%.*s\"", (int)p.payload.size, p.payload.bytes);
         LOG_DEBUG("p.payload.size   %d", p.payload.size);
         LOG_DEBUG("---- Received Packet:");
         LOG_DEBUG("mp.from          %d", mp.from);
@@ -307,7 +307,7 @@ bool RangeTestModuleRadio::appendFile(const meshtastic_MeshPacket &mp)
     fileToAppend.printf("%d,", mp.hop_limit); // Packet Hop Limit
 
     // TODO: If quotes are found in the payload, it has to be escaped.
-    fileToAppend.printf("\"%s\"\n", p.payload.bytes);
+    fileToAppend.printf("\"%.*s\"\n", (int)p.payload.size, p.payload.bytes);
     fileToAppend.printf("%i,", mp.rx_rssi); // RX RSSI
 
     fileToAppend.flush();

src/modules/SerialModule.cpp

@@ -396,7 +396,7 @@ ProcessMessage SerialModuleRadio::handleReceived(const meshtastic_MeshPacket &mp
                     lastRxID = mp.id;
                     // LOG_DEBUG("* * Message came this device");
                     // serialPrint->println("* * Message came this device");
-                    serialPrint->printf("%s", p.payload.bytes);
+                    serialPrint->printf("%.*s", (int)p.payload.size, p.payload.bytes);
                 }
             }
         } else {
@@ -408,7 +408,7 @@ ProcessMessage SerialModuleRadio::handleReceived(const meshtastic_MeshPacket &mp
                 meshtastic_NodeInfoLite *node = nodeDB->getMeshNode(getFrom(&mp));
                 const char *sender = nodeInfoLiteHasUser(node) ? node->short_name : "???";
                 serialPrint->println();
-                serialPrint->printf("%s: %s", sender, p.payload.bytes);
+                serialPrint->printf("%s: %.*s", sender, (int)p.payload.size, p.payload.bytes);
                 serialPrint->println();
             } else if ((moduleConfig.serial.mode == meshtastic_ModuleConfig_SerialConfig_Serial_Mode_NMEA ||
                         moduleConfig.serial.mode == meshtastic_ModuleConfig_SerialConfig_Serial_Mode_CALTOPO) &&